Deep in the Rift Valley of East Africa, close to some of the most ancient human remains ever unearthed, one of the continent’s last hunter-gatherer tribes is embracing 21 st-century environmentalism.

What did people eat for dinner tens of thousands of years ago? Many advocates of the so-called Paleo diet will tell you that our ancestors’ plates were heavy on meat and low on carbohydrates — and ...

This story was originally published by Yale Environment 360 and is reproduced here as part of the Climate Desk collaboration. Deep in the Rift Valley of East Africa, close to some of the most ancient ...