The planet’s 2,640 billionaires are worth $12.2 trillion. Here’s who’s up, who’s down and who’s off the list. The party is over for many of the world’s richest people. For the second straight year, ...

Even against a backdrop of rising temperatures, the year 2023 stood out: it was a year with exceptional heat as well as exceptionally widespread heat. Antarctic sea ice extent was at a record low, in ...