The San Joaquin River watershed is amid its third consecutive year of below-normal precipitation. But three dry years are merely a drop in the bucket (pardon the pun) compared to a historical record ...

Having a solid estimate of the amount of carbon that forests can pull from the atmosphere is essential for global accounting of climate change—leaders are counting on forests to pull a good chunk of ...

TUCSON — Each specimen in a strangely beautiful “treehouse” laboratory here tells a story of resilience — from droughts and floods to catastrophic wildfires and bitter winters, some occurring ...