Newly discovered fossils prove that a mysterious foot found in Ethiopia belongs to a little-known, recently named ancient human relative who lived alongside the species of the famous Lucy, scientists said Wednesday.The discovery is the latest twist in the tale of...

If you have ever watched ants move, you might have noticed that they almost always walk in a neat line, one behind the other. While it may look like discipline or training, scientists say this pattern is actually the result of chemical communication, teamwork,...