Rivers join downstream, flow downhill, and eventually meet an ocean or terminal lake: These are fundamental rules of how ...

Time is ticking for states that share the shrinking Colorado River to negotiate a new set of governing rules. One major ...

Upstream states on the Colorado River are investing in measurement technology, but experts say more data doesn't always mean more clarity.

For members of the Sani Warmi collective in Amazonian Ecuador, the day begins before sunrise. They tend to the chacra — their ...