Could Earth be home to a trillion people, or even more? We'll explore if we can do this with current technology, what future ...

Most estimates place Earth’s human population at around 8.2 billion, but Josias Láng-Ritter—a postdoctoral researcher at Aalto University in Finland and lead author of the study published in the ...

LEILA FADEL, HOST: There are now 8 billion people living on planet Earth. It's a milestone that came pretty quickly. The world added 7 billion people in just over 200 years.

Even more staggering is that of the 7 billion people on Earth, about 1.4 billion of them will be old enough to have observed the arrivals of the 6 billionth, 5 billionth, 4 billionth and 3 ...