In dozens of archaeological discoveries around the world, from the once-successful reservoirs and canals
What ancient farmers can really teach us about adapting to climate change – and how political power influences success or failure
EPA has tightened its target for deadly particle pollution − states need more tools to reach it
Tens of millions of Americans, including many Texans like me, live in counties that will soon be violating air pollution particle standards for the first time. It’s not that our air is getting dirtier – it’s because the U.S. Environmental Protection
Why does a leap year have 366 days?
Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to
Why does a leap year
Forest Service warns of budget cuts ahead of a risky wildfire season – what that means for safety
A wet winter and spring followed by a hot, dry summer can be a dangerous combination in the Western U.S. The rain fuels bountiful vegetation growth,