Scientific American

YouTube star Derek Muller built an 18-million-subscriber YouTube empire by challenging misconceptions about science. Now his own blood test and a sudden EPA reversal give his work urgent relevance.

Sunshine may hold healing rays for a variety of autoimmune diseases such as multiple sclerosis. Scientists are turning this surprising discovery into treatments

The largest, most powerful launch vehicle ever built is meant to be a key part of SpaceX’s plans to send humans to Mars—and NASA’s plans to return astronauts to the moon, too

When these energy-giving organelles thrive, so do we

Researchers are trying to rebuild sea ice above the Arctic Circle so it can reflect the sun’s warming rays, slowing climate change

Mounting evidence from genome studies indicates that, contrary to received wisdom, our species has undergone profound biological adaptation in its recent evolutionary past