Rivers are supposed to follow gravity, flowing from higher ground to lower ground in one clear direction. Yet around the world, there are rare moments when rivers behave unexpectedly and start flowing ...

High above our heads and unseen to the naked eye, rivers of water vapor flow through the atmosphere. These "atmospheric rivers" are crucial to the global water cycle. Astonishingly, they have the ...

BOGOTA, Colombia (AP) — Droughts have withered crops in Peru, fires have scorched the Amazon and hydroelectric dams in Ecuador have struggled to keep the lights on as rivers dry up. Scientists say the ...