The growing consensus that the earth is in the throes of a sixth mass extinction has focused attention on a centuries-old ecological puzzle: why do species suddenly disappear by the droves?
South America has experienced an "unprecedented" increase in extreme weather events over the past century, according to a new analysis of 600 years of tree-ring records.
We just lived through the hottest decade since the beginning of human civilization. These three companies are trying to prepare humanity to adapt to the coming changes.
