Scientific American.com

Flash floods happen when heavy rains unleash more water than the ground can absorb, causing that water to pile up and flow to low-lying areas

Brain differences in children and teens who experiment with drugs early show up before they take their first puff or sip

The National Weather Service issued timely alerts, meteorologists say, but few were listening in the hours before the early-morning flash floods along the Guadalupe River

Chemical fingerprints from volcanic rock offer hints of what’s happening in the mantle below the area where three rift zones meet in East Africa

We spoke with NASA astronaut Matthew Dominick in an exclusive, first-ever interview from the cupola of the International Space Station.

In principle, this impossible math allows for a glue-free bridge of stacked blocks that can stretch across the Grand Canyon—and into infinity