Intrepid filmmaker Ruhi Çenet ventured to near Lake Eyasi in Northern Tanzania With the help of a guide and translator, he met with members of the Hadza tribe They still hunt for their food ...

Everyone stands and grabs his hunting bow. Onwas is an old man, perhaps over 60—years are not a unit of time he uses—but thin and fit in the Hadza way. He's maybe five feet tall. Across his ...

But the Hadza tribe of Tanzania are known for their ability to run ultra-distances - sometimes up to 40km a day while looking for food. This new study found they only slept for 6.22 hours a night.

We spend more time in bed than ever before – so why don't we feel like it? A new study reveals why we're always so tired.