The animal kingdom has so many stranger-than-fiction animals. From a glowing green sea slug to a lizard with a toad's head, these weird animals are some of the most fascinating creatures in the animal ...

(CNN) — The story of two of the strangest animals on the planet just got a little stranger, thanks to clues revealed by a lone fossil specimen that scientists now say represents a long-extinct ...

The series dives into the depths of the South American wild to investigate the cast of misfits, the oddities, the weird, the eccentric and the truly bizarre. The landscape here is truly one of a kind.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The story of two of ...