Some writers think Everything's Better with Dinosaurs, but in this case dinosaurs were not brought back with cloning technology nor due to time travel, non-avian dinosaurs just survive the mass KT extinction up until modern (or even future) times. As dinosaurs are pretty well known, the in-universe explanation for they to be mostly undiscovered all this time often involves a Lost World somewhere in the far and unexplored regions of Earth, or even below the surface of the Earth, where dinosaurs manage to remain untouched. In some cases they evolved into something new, often The Reptilians or Ultraterrestrials. Although this trope uses the term dinosaur, due to Artistic License – Paleontology it is not uncommon that non-dinosaur prehistoric beasts may also be included as examples, like the Plesiosauria and the Pterosauria. But remember, dinosaurs and cavemen living together was a common trope in old media, but is more a case of Critical Research Failure than the intentional use of this trope. A Sub-Trope of Species Lost and Found, very commonly use in works with Our Cryptids Are More Mysterious, compare with Stock Ness Monster (often portrayed as a surviving plesiosaur) and Dinosaurs Are Dragons (for the idea that dinosaurs actually inspired the dragon myth). Compare Not So Extinct, which is a similar concept applied to fantasy creatures
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Anime & Manga
- In Dragon Ball, dinosaurs are seen freely roaming around the modern day world, despite Beerus claiming to have wiped them out the last time he visited Earth.
- Dilbert introduces dinosaur characters after Dilbert proves mathematically that it's impossible for the dinosaurs to have become totally extinct. Turns out they've just been hiding this entire time. (Incidentally, Dilbert's conclusion is approximately correct: some dinosaurs survived by, more or less, evolving into birds)
Film - Animated
- In Ice Age 3: Dawn of the Dinosaurs, Mesozoic creatures such as dinosaurs survived the K-T extinction in a Lost World beneath Earth's surface, which the protagonists, a gang of prehistoric mammals, visit.
- The Good Dinosaur takes place in a world where the dinosaurs never went extinct and developed a primitive society, while humans remained wild, feral creatures.
Film - Live Action
- King Kong (1933) and its sequel Son Of Kong shows Skull Island, an island in the middle of the Pacific with giant gorillas and living dinosaurs. The remake King Kong (2005) kept this idea.
- Godzilla and other of his fellow Kaiju have many origins, and sometimes are implied to be surviving dinosaurs or related to them. But the most straight use of this trope was in Godzilla vs. King Ghidorah, where Godzilla's origin is retconned as a surviving dinosaur living in an Island of the Pacific that interrupted an American-Japanese battle. Later mutated due to radiation from a hydrogen bomb test on the island.
- The Valley of Gwangi: In The Wild West a group of cowboys discover the eponymous valley where dinosaurs somehow survive into the modern age.
- The Last Dinosaur: Famous B-Movie about an Egomaniac Hunter discovering surviving dinosaurs somewhere deep under the North Pole, taking a crew there to hunt the ultimate hunter (aside from him): the last T Rex.
- Baby: Secret of the Lost Legend: A couple of young scientists discover the last remaining sauropods in the African jungle. Based on the myth of Mokele-mbembe, a Real Life African cryptid thought by locals to be a surviving race of brontosaurs.
- The Beast of Hollow Mountain starts off as a Western film, then makes an abrupt Genre Shift into a monster movie when the creature killing livestock around a small Mexican town is revealed to be an Allosaurus. It beat Valley of the Gwangi to the "cowboys vs. dinosaurs" concept by a few years.
- Probably the Ur-Example is Jules Verne's Journey to the Center of the Earth, where three 19th century explorers witness a plesiosaur and an ichthyosaur fought each other in a deep subterranean lake.
- Arthur Conan Doyle's The Lost World is about a group of scientists discovering living dinosaurs somewhere in a South American jungle.
- The Pellucidar series by Edgar Rice Burroughs has a similar premise, with dinosaurs surviving inside the Hollow Earth known by its inhabitants as Pellucidar.
- In Anonymous Rex some dinosaurs survived the asteroid and evolved into forms that could cram into latex human suits, Hard Light Holographic Disguises in the Sci-fi channel film.
Live Action TV
- Dinosaurs surviving to modern times and developing sapience is the central plot behind the TV show Dinosapien.
- Recurring culture the Silurians/Sea Devils/Homo reptilianote in Doctor Who are sentient, vaguely-human-shaped dinosaurs from Earth. In order to escape an expected planetary catastrophe that never materialised, they either left to colonise other planets or went into hibernation deep underground. There have been several violent confrontations between them and the humans who evolved millions of years later and took over "their" planet. In some stories, they even have pet non-sentient dinosaurs.
- The Voth in Star Trek: Voyager are descendants of hadrosaurs that left Earth after discovering space travel, reaching the other extreme of the Galaxy, or Delta Quadrant. But, except for some scientists, they are totally unaware of their Earthly origins, as their religion says they are natives of that region of space.
- Sir Arthur Conan Doyle's The Lost World a very loose adaptation of Doyle's book has dinosaur (and humanoid Reptilians) living in the eponymous Lost World.
- The Sliders's episode "Dinoslide" shows a parallel world where dinosaurs never became extinct, becoming an endangered species.
- In the Chilean puppet show 31 Minutos, one of the songs of the show is Dinosaur Anacleto, the only surviving dinosaur on the Earth that even became a showbiz personality. The song is in general a melancholic one, since the main theme of the song is how lonely Anacleto is because all his dinosaur friends are dead and he wants friends again.
Religion & Myths
- Some Creationists believe that dinosaurs survive up to historical times and co-exist with modern humans. Some even think that dinosaurs still exist and are the origin of several cryptids like the Loch Ness Monster.
- As mentioned in the film section, some cryptids around the world are thought to be living dinosaurs. The first one was probably the Loch Ness Monster. Africa has several, especially around the Congo region with Mkele Mbembe as the most famous one. There's also the Ropen (an alleged living pterodactyl) in Indonesia. Most modern cryptozoologists do not take these claims serious and, although they do believe some of these animals could be undiscovered species, most of them do not think they are literally [non-avian] dinosaurs.
- Birds are surviving dinosaurs. The last surviving members of the dinosauria clade.
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