Half-million-year-old ‘Lincoln Logs’ may be first wood structure made by ancient humans

After 1 year in space, what's next for an astronaut? 'Peace and quiet' on Earth, Frank Rubio says (video)

A new human species? Mystery surrounds 300,000-year-old fossil

130-Million-Year-Old Trace Fossils Reveal Earliest Evidence of Deep-Sea Vertebrates