There was a moment in human history when our entire existence may have desperately clung to a thousand or more people.

Scientists have uncovered a surprising new picture of human origins that challenges the long-held idea of a single ancestral ...

Add Yahoo as a preferred source to see more of our stories on Google. (Mait Juriado photo/Moment/Getty Images) The human population has already grown too large and demanding for Earth to sustainably ...

Earth's population's currently sits at 8.3 billion people – but it's set to get much bigger. That's according to scientists from Flinders University, who have estimated the peak population for our ...