Researchers discovered that a 215-million-year-old reptile started life on four legs and switched to two as an adult.

In paleontology, lineages that drop out of the fossil record and then re-emerge after long periods are termed ‘Lazarus taxa.’ ...

When the asteroid ended the age of non-avian dinosaurs, it cleared ecological space on a global scale. Small survivors ...

Discover a surprising 155-acre garden in Rockford, Illinois, filled with wooded trails, colorful plantings, and fascinating features worth exploring.

That visibility comes with scrutiny. Mammals are among the best-studied organisms on Earth - and among the most threatened.

Two marsupial species presumed to be extinct have “risen from the dead” after being rediscovered on the island of New Guinea, which lies north of Australia. One is the pygmy long-fingered ...

Herald readers write what's on their mind. | Letters ...

Roughly 6,800 mammal species are known to exist, compared with about 8,800 species of amphibian, 11,000 species of bird and 12,500 of reptile. Yet when most people picture biodiversity, they often ...

That’s one of Missouri’s best-kept secrets: incredible natural attractions hiding just off the beaten path, waiting to be ...

Here’s a fun fact that’ll make you do a double-take: Missouri has castle ruins. Not replica castle ruins or some cheesy tourist trap with foam turrets, but actual honest-to-goodness stone castle ruins ...

Two marsupials thought extinct for over 7,000 years were rediscovered in New Guinea through fossils, photos and citizen science.

This tweet-heart is getting a happy ending. A beloved bright-green-and-yellow parakeet named Mei Mei who spent 10 weeks living with a flock of sparrows in the wilds of Central Park now has a forever ...