A small fraction of tropical tree leaves already pass the threshold, scientists estimate, and that number could grow under worst-case climate models.

In our warming world, kids are running out of places to play safely.

Wildfires have also engulfed popular Greek tourist destinations such as Corfu, Evia and Rhodes.

Armed with new technology, botanists are proposing what was once thought impractical: reviving long-lost plant species by using seeds from dried specimens in collections. The challenges remain daunting, but researchers are now searching for the best de-extinction candidates.

Arizona will not approve new housing construction on the fast-growing edges of its largest city that rely on groundwater thanks to years of overuse and a multi-decade drought worsened by the climate crisis