Melanin samples are headed to the International Space Station to test their ability to protect against radiation.>
Several U.S. states are considering the harm-reduction strategy.>
True change requires persuasion from the ground up.>
Emily Gurley’s painstaking surveillance is catching up with a lethal virus.>
For five decades, David Paige has fought to radically improve children’s nutrition in the U.S.—and amassed tangible evidence of the journey.>
Does Plasmodium drive mosquitoes’ feeding behavior?
A new screening test finds evidence of cancer in DNA fragments.>