Policy

In a reversal, the Food and Drug Administration has removed black box warnings on hormone replacement therapies for menopause

Reflect Orbital’s plan to deliver “sunlight on demand” using thousands of giant orbital mirrors is just the latest in a growing list of disruptive commercial activities in space

Ahead of Jared Isaacman’s renomination for the position of NASA’s administrator, a dispute between him and its acting chief Sean Duffy spilled into the open, with potentially profound consequences for the U.S. space agency

“The only countries that will really learn more if [U.S. nuclear] testing resumes are Russia and, to a much greater extent, China,” says Jeffrey Lewis, an expert on the geopolitics of nuclear weaponry

Russian leader Vladimir Putin claimed his nation conducted a successful flight of a nuclear-powered cruise missile. Here’s how that missile might work

Massive marches nationwide in the U.S. marked a turn against an increasing acceptance of political violence among protesters, report sociologists

Hundreds of people at the U.S. Centers for Disease Control and Prevention have received layoff notices, and work at many federal laboratories has been suspended

A quarter of the Centers for Disease Control and Prevention staff is gone after the Trump administration’s latest reductions in force and earlier layoffs

Of the 202 Nobel laureates in physics, chemistry and physiology or medicine this century, fewer than 70 percent hail from the country in which they were awarded their prize. These graphics trace their journeys

President Trump’s budget office lays out guidelines for mass federal lay-offs as the U.S. government grinds to a halt

President Trump says Tylenol is not safe for young children. Here’s what the science says about acetaminophen

Brain imaging is illuminating the patterns linked to productive, positive dialogue, and those insights could help people connect with others