The Futurama episode "Kif Gets Knocked Up a Notch" aired 20 years ago today. According to Kif, 20 years is how long it would take his and Amy's tadpoles to sprout legs and crawl back onto land as children.

"Kif Gets Knocked Up a Notch, " the first season of season 4, aired on Janury 12th, 2003. The episode follows Kif and Amy's relationship as Kif is suddenly impregnated and returns to his homeworld to give birth. The episode was written by Bill Odenkirk and directed by Wes Archer.

According to Kif, it takes 20 years for his and Amy's tadpoles to sprout legs and crawl back onto land as children. It's been 20 years since the episode aired, so I guess they're emerging today.

Or rather, they will 1000 years from now.

Well, they would emerge 1000 years from now if we ignore the fact that the show had a floating timeline.

And that it's fictional.