A new study shows two species of early human ancestors used their hands for both climbing and tool-making WASHINGTON — Our hands can reveal a lot about how a person has lived – and that’s true for ...

"There are no limitations. When you create a sci-fi show, you're not bound to the rules or restrictions here on Earth," ...

Humans lost an average of 44 hours of sleep a year during the first two decades of the 21st century. Read more at ...