Crocodiles appeared to rescue a dog that had been chased into a river, and scientists said this unusual behavior could indicate empathy — but others are skeptical.
The Wollemi pine was thought to have gone extinct 2 million years ago until it was rediscovered by a group of hikers in 1994. Now, scientists have decoded its genome to understand how it's survived — almost unchanged — since the time of the dinosaurs.
Many tortoise beetle larvae create shields for themselves using faeces and old skin. Scientists have now looked at how and why they create these poop parasols.
Ice-age humans may have set fires that led to the extinction of large mammals across what is now Southern California.
The footage from a camera trap in Yasuní Biosphere Reserve in eastern Ecuador appears to be the first time a fight between a sloth and an ocelot has been caught on film.