A fossil of an armadillo-like mammal appears to bear cut marks from butchering by humans, suggesting people were living in South America at least 20,000 years ago, even earlier than once thought.

Sotheby's is presenting one of the most complete skeletal remains of a Jurassic creature. But some people say such specimens should not be auctioned.

When the dinosaurs walked the Earth, massive marine reptiles swam. Among them, a species of Ichthyosaur that measured over 80 feet long. Today, we look into how a chance discovery by a father-daughter duo of fossil hunters furthered paleontologist's understanding of the "giant fish lizard of the Severn." Currently, it is the largest marine reptile known to scientists.

Read more about this specimen in the study published in the journal PLOS One.

Have another ancient animal or scientific revelation you want us to cover? Email us at shortwave@npr.org — we might talk about it on a future episode!

Are you terrified yet? Because we certainly are. Scientists even named their discovery of a 43 million-year-old fossil after Anubis, an Egyptian god associated with death.