People lived in many parts of the Old World by then but had not yet reached Australia or the Americas. The bulk of the human ...

This week, meet a big-brained ancient human relative, hear a meteorite as it lands on Earth, spot a tiny kangaroo-like marsupial, and more.

DNA analysis of that tiny fossil led to the 2010 finding that it represented a distinct ancient human population, which scientists dubbed the Denisovans. Many people alive today carry traces of ...

"And then we found this positive effect of human population density on survival time. Both of those things are unexpected because we usually associate human activity with detrimental effects on ...

"And then we found this positive effect of human population density on survival time. Both of those things are unexpected because we usually associate human activity with detrimental effects on ...

This article was originally published with the title “ The Urbanization of the Human Population ” in Scientific American Magazine Vol. 213 No. 3 (September 1965), p. 40 doi:10.1038 ...