There are 8 billion of us alive today, give or take a few hundred million. We crowd cities, cross oceans in mere hours, and ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." “We were surprised to find that the actual population living in rural areas is much higher than the ...

It’s generally understood that Earth’s population is somewhere around 8.2 billion people. That’s the baseline we use to plan everything from food supply to vaccines to climate policy. But what if that ...