"Every time you bring real-world physics into Hollywood, God kills a catgirl. So please, think of the catgirls."
"Of course! Don't you know anything about science?"
On the one hand this is ostensibly a story about evolution thatís meant to teach all the little boys and girls of the United Kingdom how that works. On the other it has next to no understanding of how it works, what timeframe it works over, and postulates a bizarre system in which spiders, humans, and the Creature From the Black Lagoon are all meaningfully the same species.