Planetary-scale Species Extinction of ''all'' multicellular life. The planet may be fit for re-habitation, but in the meantime, there's nothing more complex than bacteria left.



[[folder:Anime and Manga]]
* This happens at the DownerEnding of ''Manga/{{Saikano}}''.
* The future world in ''Anime/YuGiOh5Ds'', which is shown both in the series and [[Anime/YuGiOhBondsBeyondTime the movie]]. [[spoiler: Synchro Monsters overload Momentum, essentially recreating Zero Reverse on a much larger scale. By the end of Aporia's memories; of the four survivors, three are dead, leaving the partially/robotic Zone and no other sign of life on the planet]].
* Later volumes of ''Manga/RaveMaster'' reveal that the world actually exists due to a ResetButton. Prior to it, the world was one human away from Class 5. This one survivor used the power of Star Memory to reset the world. [[spoiler:But, since reality got tampered, Endless was created to try and jerk the world back to the Class 5 it was.]]
* Hades' plans for Earth in ''Manga/SaintSeiya'' was to create an eternal "Great Eclipse", so Earth would freeze over and all life would die, turning it into a dark world much like the Underworld.

[[folder:Fan Fiction]]
* In ''FanFic/ClashOfTheElements'', after taking control of [[spoiler: Joe Dark]]'s body, the [[spoiler: Dark King]] set in motion events that would bring about one of these to [[Franchise/SuperMarioBros Plit.]]
* [[TheSlenderManMythos In the Slender Man fic]] ''Fanfic/ByTheFiresLight'' the story ends with the Slender Man calling in other [[EldritchAbomination Eldritch Abominations]] to take Earth as their own and boot off anything already on the planet.

* In ''Film/TheRoad'', the Earth's biosphere extinction has already occurred and the world is in the final stages of dying.
* This is the ''starting'' premise of ''Film/{{Pandorum}}'' and initial best case scenario; then we find out the surviving humans wake up marooned on an ark after an offscreen [[EarthShatteringKaboom Class X-2 event]]. It went FromBadToWorse when the personnel in charge [[GoMadFromTheRevelation went insane]] and left everyone in suspended animation for 900 years, where most of them evolved into [[ZombieApocalypse zombie-like creatures]] that feed on the living. Oh, and the [[TimeBomb ship's reactor]] is melting down.
* The worst case scenario in ''Film/{{Armageddon}}'' involved this, if the asteroid "the size of Texas" would have hit, killing everything larger than bacteria.
* This appears to be the setting in the Shane Acker film ''[[WesternAnimation/{{Nine}} 9]]''. The only things left? Sack people. And horrific machines. [[spoiler: The ending however, shows that bacteria have returned, starting the evolution of life all over again]].
* The mostly-forgotten Japanese disaster epic ''Virus'' begins with the accidental release of a [[TheVirus virus]] that kills off all vertebrate life on the planet except in Antarctica, leaving pretty much only penguins and 800 or so scientists and base personnel. Then it goes FromBadToWorse thanks to a UsefulNotes/ColdWar doomsday machine.
* The likely outcome if the ''Film/{{Spaceballs}}'' had succeeded in stealing Druidia's atmosphere, though some life may have survived in the oceans.
* This is apparently what the Final Protocol used by the Necromongers does to every planet they visit in ''Film/TheChroniclesOfRiddick''.
* It's implied that Franchise/{{Godzilla}} going into nuclear meltdown in ''Film/GodzillaVsDestoroyah'' would incinerate the atmosphere causing all life on the planet to perish. It's only due to [[spoiler:Junior absorbing the excess radiation and mutating into an adult Godzilla]] that prevents this from happening.
* The cheesy sci-fi classic ''Film/RobotMonster'' had the title baddie wiping out all life on Earth [[EvolutionaryLevels above insect level]], save for a family of humans who took a serum to counteract the invader's AppliedPhlebotinum. (The family lived [[ContrivedCoincidence a short walk away from the cave the alien was living in]].)
* This is the effect of the Doomsday Machine from ''DrStrangelove''. [-[[SoundtrackDissonance We' again...]]-]

* Creator/CSLewis's ''{{Narnia}}'' has the Deplorable Word, an incantation that instantly kills every living thing in the user's world except the user. Jadis of Charn used this long before becoming the White Witch; luckily, alternate magical laws seem to keep it from working on Earth or Narnia itself.
* David Gerrold's ''TheWarAgainstTheChtorr'' series is either Class 4 or Class 5. The Chtorr are gradually but inexorably replacing Earth's biome with Chtorr. The apparently inevitable result is the replacement of ''all'' life forms on Earth with Chtorr. [[spoiler: The invasion started at the microbe level, with plagues that devastated the majority of human population. As the invasion continues, more and higher level positions in the food chain are being replaced with Chtorr, with the possible exception of the worms, who appear to be top-tier predators. But since nobody knows exactly what the Chtorr is, it's hard to say for certain.]]
* In ''Literature/TheRoad'', the Earth's biosphere extinction has already occurred and the world is in the final stages of dying.
* Clarke and [[StephenBaxter Baxter's]] book ''The Light of Other Days'' describes an enormous asteroid that's going to collide with the Earth; large enough that the heat released will more or less sterilize the face of the Earth, such that only the most basic bacteria can survive. It eventually transpires that [[spoiler:this had already happened once, billions of years ago, and the civilization that existed then hid away the life that would eventually evolve into us]].
* StephenBaxter's ''Literature/{{Evolution}}'' does a FlashForward near the end to the death of the very last lifeforms on Earth. This is so far in the future that the sun has begun to expand in preparation for its collapse into a white dwarf.
* The eventual fate of Earth in Creator/IsaacAsimov's ''Robots-Empire-{{Foundation}}'' novels, due to gradually increasing background radiation, which starts as a Class 0 event and gradually rises up to this level. It takes long enough that everyone eventually moves out into space.
* KurtVonnegut's novel ''Literature/CatsCradle'' ends with [[spoiler:the destruction of all life on Earth by a sample of "ice-nine", which causes all of the planet's water [[TheVirus to convert to ice-nine]], which has a room-temperature freezing point. Thus, all the water in the world freezes solid.]]
* The Franchise/StarWarsExpandedUniverse featured a prototype Death Star and the ''[[ComicBook/DarkEmpire Eclipse]]''[[ComicBook/DarkEmpire -class Star Destroyer]], both of which mounted a powered-down version of the Death Star's famous WaveMotionGun from ''ANewHope'', which could "only" "crack the planetary crust" and would likely result in something like this.
** Twenty years before ''Literature/GalaxyOfFear'' an experiment on the nature of life went wrong on Kiva and wiped out said life across the entire world, turning it into a GhostPlanet. From orbit it's charcoal-colored, landing on it reveals not so much as a blade of grass. The sentient natives ''sort of'' survived as [[OurGhostsAreDifferent vengeful wraiths]], eager to punish the one responsible - since he's TheAtoner, he doesn't fight.
* In the backstory of the Mageworlds books by Debra Doyle, this happens to Entibor.
* In ''Literature/TheKillingStar'', by Charles Pellegrino and George Zebrowski, all life on Earth above the level of bacteria is destroyed using a planet-wide relativistic bombardment.
* Ethan I. Shedley's ''Earth Ship & Star Song'' begins with the premise that, despite largely successful efforts to ward off eventual extinction by environmental damage, the latest model projects only hundreds of years remain before life as we know it cannot be sustained even at minimum levels of consumption and entropy. The remaining humans alive decide to leave to escape this Class 5 destruction. [[spoiler:However, in performing the research necessary to leave in any meaningful manner, they "accidentally" visit Class X-2 destruction on another intelligent species, launching the main plot of the book of humans as fugitives.]]
* Creator/ArthurCClarke's ''Sunstorm'' (second book in ''A Time Odyssey'') has the Firstborn redirected a planet and make it hit the sun around AD 0-10, which caused the sun to make coronal mass ejection , threatening to destroy the whole atmosphere.
* In ''Literature/SaturnsChildren'' this happens as part of the backstory. The robots who are left have enforced a strict quarantine on green goo and pink goo in the hopes that they can reconstitute the biosphere, particularly humans (they seem to be 3 laws robots and miss dealing with the first two).
* Wilbur Whateley's journal, in Creator/HPLovecraft's ''The Dunwich Horror'', contains several references to the Earth's life being "cleared off", presumably to make way for {{Eldritch Abomination}}s. Averted... but possibly still on the agenda of any surviving ''half''-siblings of Wilbur's.
* It happens so often to the Posleen, from the ''Literature/LegacyOfTheAldenata'' series, due to uncontrolled population explosions, that they have a specific name for it.
* [[spoiler:Ouranos]] of the ''Literature/OldKingdom'' trilogy has this as his main goal. And he's done it before to other worlds before becoming SealedEvilInACan.
* The FinalBattle of JohnCWright's ''Literature/WarOfTheDreaming'' is expected to result either in this or Class 4 event. For obvious reasons, not many people want it to happen.
* ''Literature/TheKillingStar'' begins with an interstellar bombardment of relativistic bombs pointed directly at Earth. The energy of the collisions causes so much devastation that almost all multi-cellular life is immediately annihilated.
* Frank Herbert's Franchise/{{Dune}} series, as well as the sequels by Brian Herbert and Kevin Anderson include the Obliterator weapon. This weapon was stolen from the Machine Empire by the Honored Matres and used in a SaltTheEarth retreat across the galaxy. They later use an Obliterator against Arrakis in an attempt to destroy the natural source of Spice and a number of their enemies (including Darwi Odrade, Sheanna, and Duncan Idaho). In the Dune sequels, the Guild Navigators use an Obliterator against Richesse at the behest of the Honored Matre rebels to cripple the Bene Gesserit. Although the use of the Obliterator destroys all life on the planet, it's later revealed that a number of the worms of Dune knew that the attack would come (being possessed with prescience thanks to Leto II) and survived the attack by burrowing deep into the planet's crust.

[[folder:Live-Action TV]]
* ''Franchise/StarTrek'' has a number of cases of this: an atmosphere is burned off in [[Series/StarTrekTheNextGeneration "The Chase"]], the Metrion Cascade killed everything on Rinax as detailed in [[Series/StarTrekVoyager "Jetrel"]], and if the whole thing wasn't a trap, the Tal Shiar/Obsidian Order attack fleet would have bombed the Founder's homeworld down to its core in [[Series/StarTrekDeepSpaceNine "The Die is Cast."]]
* The Season Six finale of ''Series/BuffyTheVampireSlayer'' deals with [[WoobieDestroyerOfWorlds Dark Willow]] attempting to burn the Earth to a cinder. [[CrowningMomentOfHeartwarming Xander talks her down with the]] PowerOfLove.
** The Season Two finale had Acathla, a demon who would have sucked the world into Hell. This wouldn't actually have killed anyone - just subjected them to an eternity of torment.
* The Slitheen family from ''Series/DoctorWho'' wish to enact this on Earth to make a profit. By inciting a world-wide nuclear armageddon, they would be able to sell off the radioactive "molten slag" left over as cheap fuel.
** Two years later, in ''Series/TheSarahJaneAdventures'', more members of the Slitheen family nearly put out the Earth's sun, so they can scavenge the dead planet to the highest bidder. The Veil Androvax's homeworld is also left uninhabitable by the sun going out.

[[folder:Tabletop Games]]
* The "Destinations" setting in [[HeroSystem "Post-Apocalypse Hero"]] takes place after a solar flare sterilized the Earth. [=PCs=] are among the few people who were far enough below ground to not be vaporized. Oh, yes, the total absence of plant life not only cuts down on food options but could thoroughly hose oxygen levels if you can't find a way to fix matters.
* Yet another ''TabletopGame/{{Warhammer 40000}}'' example: this usually happens to planets when Chaos, Tyranids or Necrons win. Not even unicellular organisms can escape their nightmarish campaigns.
** Or if they lose, and someone calls on some of the less extreme forms of Exterminatus. (With the ''more'' severe ones, there isn't a planet left afterwards.)
** Special mention to the IronWarriors short story "The Heraclitus Effect", in which Honsou uses an experimental ''agricultural aid'' to hyper-accelerate the growth of remnant Tyranid growths on [[spoiler:Tarsis Ultra]] - out of ''spite''.
* In the ''TabletopGame/DungeonsAndDragons'' Splat book Elder Evils, this is the most likely worst case for two scenarios:
** Father Lymic's attempt to create TheNightThatNeverEnds would, if not stopped, freeze the entire planet, making it uninhabitable by anyone except himself and his demonic brood. Even if the heroes win and restore the sun, the damage the Elder Evil has done would likely impact the world for generations to come, resulting in a Class 1.
** Zargon's vile slime would likely cause all living beings to die in agony, leaving the world habitable only by the broods of Jubilex and Zargon himself.

* What happens to planets in VideoGame/{{Spore}} if you don't kill infected creatures in time in some some Space Stage missions. Everything, except your colonies, dies.
* ''VideoGame/UltimaVI'' and ''VideoGame/UltimaVII'' has the Armageddon spell, which annihilates all life in the ''universe'' except the caster and people with natural immortality. (The Xorinian wisps don't think it's very powerful since it can't affect parallel universes, and like to hand it out as a SecretTestOfCharacter. This is also why life in Britannia suffered a drastic setback 700,000 years ago...)
* ''VideoGame/EndlessLegend'' has the eventual demise of Auriga, the planet the game is set, as one of its key themes. Each one of the factions that inhabit Auriga must find their own way to survive the coming apocalypse.
* ''Franchise/{{Halo}}'':
** ''Literature/HaloTheFallOfReach'' established that the Covenant's main mode of operation against human worlds is "glassing", a systematic bombardment of the planet's surface with plasma weaponry that vaporizes the ecosphere and reduces the surface to a uniform glassy mineral. About the only time they ''don't'' do this is if a human world has Forerunner relics on it. Later sources dial down the power of glassing a bit: the Covenant don't actually ''have'' the ability to 100% glass an entire planet and wage a large-scale war at the same time. The damage is still catastrophic, but many planets that the Covenant don't consider important only receive a cursory glassing, which often leaves survivors who are able to survive on their ruined worlds for years afterwards. And restoration of glassed planets is possible, even if the process is still lengthy and arduous.
** The UNSC have the experimental NOVA Bomb, which blows up planets.
* ''VideoGame/{{Fahrenheit}}'' takes place during the buildup to a Class 5. [[spoiler:If the Purple Clan gets the [[AGodAmI Indigo Child's secret]], the continuation and inevitable extinction of humanity and all other life is the [[MultipleEndings ending]]. There's a ray of hope in that it's said a new Indigo Child has been conceived... but the implication is that it's too late.]]
* ''VideoGame/HeroesOfMightAndMagic IV'' begins with two characters from the previous game meeting on the battlefield, and when their Artifacts of Doom touch, the atmosphere is instantly ignited, killing everyone except for a few people who managed to port to another planet or something.
* The notorious Corrupted Blood Incident had the potential to do this to the entire ''VideoGame/WorldOfWarcraft'' game world, and had it been intentional on the part of the developers, it clearly would have. Despite being a glitch [[OnlyTheAuthorCanSaveThemNow that was eventually repaired]], the effect it had on the game world was ghastly, leaving skeletal remains of [=PCs=] and [=NPCs=] alike strewn on the streets of the major towns and cities. (Oddly enough, actual epidemiologists and counter-terrorists have studied the incident for its implications of how human populations could react to a real-world epidemic.)
* Lots of ways to get this in ''VideoGame/MasterOfOrion 2''. Excessive bombing, especially with biological weapons ends like that. If you give Space Crystal a chance, it wipes your colony with Death Spores. When you fail to defend a colony from [[HordeOfAlienLocusts Space Amoeba]], it devours everything and, after it finished its lunch, every planet in the system is toxic forever (or until Class X variant is applied).
* ''VideoGame/StarCraft'' sees the Protoss initially doing this to every single planet that the Zerg have colonized, wildlife or Terrans notwithstanding.
* ''VideoGame/TabulaRasa'' started off AfterTheEnd of human civilization on Earth with this. In the opening video, Sarah Morrison's voice over says "We never stood a chance?" Not the Bane's forces, the world militaries made quite a showing after the initial invasion. So rather than fight it out, the Bane ''[[ColonyDrop dropped Ceres onto Earth]].''
** Remember the Miracle Planet video? That was a simulation of an impact by a 500 km wide asteroid. Ceres is 950 km wide.
* This is what will happen in ''VideoGame/TheLegendOfZeldaMajorasMask'' if you fail to prevent the moon from completing its suicidal fall after the three-day time limit.
* Accidentally triggering this early is what lands War in the mess he finds himself at the beginning of the game in ''{{Darksiders}}''. Oops?
* This is what happens to Lore at the end of the ''Doomwood'' saga in ''VideoGame/AdventureQuestWorlds'' if you choose to [[spoiler:betray Artix and allow Vordred to become the Champion of Darkness, allowing him to unleash the mother of all {{Zombie Apocalypse}}s on Lore by turning all life in the world undead]].
** The ''Doomwood II'' saga, and in particular the ''Adventure Quest Worlds: Zombies'' universe, has [[spoiler:Sepulchure actually unleashing one of these on Lore with his zombifying fog after killing Death. The way things are shaping up, the only people left in Lore who are still human are your character, Artix (who is the Champion of Darkness) and Gravelyn (who has just been revealed as the Champion of Light)]].
* Considering that an {{omnicidal|Maniac}} [[EldritchAbomination dragon-thing]] [[GodOfEvil of supreme power and malevolence]] is [[TheBadGuyWins about to]] [[PlanetEater suck the world hollow]], this is the ''best''-case scenario for what [[NayTheist Defiant]] [[PlayerCharacter Ascended]] are [[SetRightWhatOnceWentWrong sent back in time to avert]] in ''{{Rift}}''. (It's quite possible, or even likely, that it's [[ApocalypseHow/{{Class6}} far]] [[ApocalypseHow/ClassX worse]] than that.)
* In ''VideoGame/{{Runescape}}'', one high level quest involves visiting an alternate world where one of these had taken place. Apparently, the society there was made of powerful mages who found the Stone of Jas, an artifact from which the gods draw their power. Usage of it advanced their society, but it also awoke the Dragonkin, who proceeded to burn everything. When the mages tried to use the Stone to defend themselves, it simply made the Dragonkin more powerful. "Your power is taken from the Stone. Our power ''is'' the Stone".
* In ''VideoGame/{{Homeworld}}'', several races have Atmosphere Deprivation Weapons. These have the effect of setting the atmosphere ''on fire''. If only one or two are fired, it only results in a Class 0 effect (the size of a continent) - however, it only takes a few to render the planet completely and permanently uninhabitable. It happens several times.
** In the backstory, a vengeful [[TheEmpire Taiidan]] Admiral uses these on many populated Hiigaran worlds (though admittedly the Hiigarans had bombarded his planet with conventional weapons beforehand). He only stops because of a galactic outcry for peace.
** In the first game, on the third mission, you [[spoiler:return to Kharak (your home planet) after your first Hyprspace run... only to find it [[DoomedHometown burning as a result of ADW bombardment.]] One of the most unexpected [[DoomedHometown Doomed Hometowns]] ever, and is also a real TearJerker. Sure, Kharak was a tiny, almost inhospitable desert planet... but it was home. Add to that the fact that almost the entire Kushan population was down there, leaving your Mothership and her fleet the last Kushan in the galaxy, and you really, really begin to hate the Taiidan Empire (who were responsible). Oh, and the reason? You broke a treaty that was ''four thousand years old'', stating you couldn't develop Hyperspace technology, that not one single Kushan even ''remembered''.]]
** Then in ''Homeworld 2'', set 100 years after the events of the original Homeworld, [[spoiler:the Vaygr attack Hiigara with a massive fleet consisting of three [[KillSat Planet Killers]]. These are incredibly cool, but just happen to each carry a large payload of [=ADWs=], which they try to drop on Hiigara. You have to destroy the missiles before they enter the atmosphere, and then use the [[LostSuperweapon Sajuuk's]] WaveMotionGun to destroy them, because it is [[MadeOfIron the only gun that even has a chance of denting them.]]]]
* As he explains right before the final boss fight, the Grandmaster from ''VideoGame/{{Strider}}'' plans to burn off all life on Earth so he can recreate life on it and become their true God. [[spoiler:Subtle hints in ''Strider 2'', set 2000 years after, seem to imply ''he succeeded''.]]
* In ''VideoGame/{{Cytus}}''' backstory, a mysterious and incurable virus wipes out all sentient life on Earth, save for robots.
* ''VideoGame/FlightRising'' has ''two'' apocalypses in its lore. The first was caused by humans making a giant machine which blew up and accidentally brought the Arcanist into the world. The second was caused by [[MikeNelsonDestroyerOfWorlds the Arcanist dicking around with the Shade]].
* ''VideoGame/XenobladeChroniclesX'': Lin's narration, [[ during the opening cutscene]], recounts how the people of Earth were caught in the crossfire of two warring alien races, and were forced to flee their planet's destruction. But the Ganglion caught up to them only two years later and destroyed [[ColonyShip their ship]], forcing them to crash-land on planet Mira.

* In ''Webcomic/{{Homestuck}}'' any planet that will develop Sburb will be bombarded with meteors that are teleported away from Skaia during the Reckoning. These meteors start out extremely infrequent and small, but will grow in intensity and size until the players of the game are to enter the Medium. After that point, the meteors will easily wipe out any and all life on the planet. However, the game will also send Exiles from the Incipisphere, whose purpose is to recolonize the planet of the Heroes.
* In ''Webcomic/WhiteNoise'', the invading aliens temporarily halted the Earth's rotation, which caused everything to be thrown into the atmosphere and immolated. They then tried to {{Terraform}} the planet to suit their needs, but this didn't take. Life was only able to return to the planet because humans had three orbital space colonies to repopulate from. The Earth is presently habitable, but only by a very generous application of the word habitable.
* At the end of ''Webcomic/{{minus}}'', minus brings everything in the afterlife BackFromTheDead. This causes all life on Earth (including the recently revived) to be crushed by the sheer influx of bodies. [[SubvertedTrope Life lives on in the spirit world, though.]]
* ''Webcomic/{{Spacetrawler}}''. When a group of Eebs is liberated from slavery, they decide to demonstrate how pissed off they are by raining telepathic fire upon planet Carpsellon and melting its surface to slag. [[spoiler:There end up being a few survivors: Red-9, the lone Eeb on Carpsellon's surface, is able to telepathically repel the fire, and several other characters are protected by being far underground when the fire comes.]]

[[folder:Web Originals]]
* ''TechInfantry'' has a the moon severely structurally weakened by having miniature black holes repeatedly fired ''through'' it, then a large starship crashed into the crater at a large fraction of the speed of light, shattering the moon into a billion pieces. The fragments of moon rock shower down onto the surface of the Earth, creating enough kinetic heating from the impacts to ''melt'' most of the surface of the Earth and boil the oceans.
* In one ''[[Roleplay/GlobalGuardiansPBEMUniverse Global Guardians]]'' story, the Guardians traveled to a world in which the criminal MadScientist Doctor XX had succeeded in eradicating all male life on the planet through a tailored virus. By the time the heroes arrived, the virus had died off... and the remaining human population (all female) had descended into MadMax-style post-Apocalyptic barbarism due to the sure knowledge that the human race was doomed to utter extinction.
* The Wiki/SCPFoundation mentions a number of "_K class end of the world scenarios" (XK, NK, etc), most of which are kept vague because of [[NothingIsScarier [DATA EXPUNGED]]]. The most prominent to be described in detail, [[ SCP-093]], is one of these, possibly a borderline Class 6. [[spoiler:And we know so much about it because it already happened.]]
** One of these scenarios ends with every inch of the Earth [[ being buried under hundreds of miles of cake]]. No, really. Just because it sounds silly doesn't make it less deadly.
* This is one of the endings in {{VideoGame/One Chance}}.
* SuperMarioBrosZ: The antagonist Turbo Mecha Sonic/Metallix causes this to befall [[spoiler:[[DeathWorld Mobius]] after {{colony drop}}ping the Death Egg onto it]] He more or less intends to do this to the Mushroom Kingdom as well.

[[folder:Western Animation]]
* WordOfGod has confirmed that this would have been ultimate result of Nightmare Moon's actions in ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' (as during TheNightThatNeverEnds the entire planet will inevitably freeze over), had she not been defeated. (The ''Pony Psychology'' fan work series has an entire chapter devoted to Celestia [[WhatTheHellHero lecturing Luna on the true consequences]] of the environmental and ecological effects of an endless night - with frighteningly accurate scientific references and detail - mostly in an attempt to quell the notion that Nightmare Moon might have been doing them a favor.)

[[folder:Real Life]]
* Arguably, this might have happened to Mars and/or Venus. Some of the most extreme worst-case global warming scenarios see Earth heading this way too, although this view doesn't have widespread support among even climatologists.
* It's been estimated that Earth itself has experienced this several times (fortunately, all were at the time where life was only ''beginning'' to become complex before each event).
* This is the likely outcome of any asteroid strike of a sufficient size larger than a few miles across: Earth's surface would be burned away or covered in magma, and the only survivors might be archaeobacteria deep within the earth's crust. Worst news? It'll eventually happen, since the death of the Sun will have the same effect.
** The first episode of the Creator/DiscoveryChannel miniseries ''Miracle Planet'' demonstrated this using an asteroid around 500 km in diameter (that's smaller than the diameter of the above-mentioned asteroid from ''Armageddon'') colliding with present-day Earth.
* Most scientists predict that the final mass extinction will take place as early as 1 billion years from now because by then the warming and expanding Sun will actually raise temperatures on Earth so much that all carbon dioxide will literally be stripped from the atmosphere. When carbon dioxide levels reach a low enough level, all plants will become extinct because plants need carbon dioxide to survive, and consequently the loss of plants will remove all oxygen from the atmosphere as well, and combined with even faster warming, will also end all animal life.
** Of course, if humanity or an equally intelligent descendant thereof is still around in 1 billion years time we'll hopefully be either long gone or have such advanced technology to laugh at the sun.