The World’s Most Polluted Cities Let’s say you’re a global tourist and instead of looking for ancient ruins, five star restaurants or sun-splashed beaches, your goal is to spend your time in cities ravaged by pollution.  Where would you look? Beijing citizens have a cynical slogan: “Don’t trust air you can’t see,” but the city […]

Multiplying Disasters Does it seem to you that America is experiencing more than its share of natural disasters, and that there are more extreme weather events happening today than ever before? Turns out you’re right. Since 1970, the number of major storms, floods, earthquakes and heatwaves that cause at least ten deaths or prompt the […]

Archeologists have long traveled under the assumption that what we call the human race—the African hominids known to science as “homo sapiens”—evolved roughly 200,000 years ago in either southern or eastern Africa. Starting perhaps as early as 100,000 years ago, they migrated out of Africa and eventually displaced the European and Asian hominids known as […]