A disruption in federal funds has jeopardized HIV testing and outreach in the U.S. South, and researchers warn of a resurgence of the epidemic in the region

Kosmos-482, a failed mission to Venus from the former Soviet Union that stalled in Earth orbit in the 1970s, is about to fall back to our planet. Exactly where or when it will strike, however, remains unknown

A bipartisan group in Congress is drafting a sweeping bill to overhaul the Federal Emergency Management Agency—in some cases, expanding its work

After billions of dollars in spending and decades of planning, NASA may be forced to abandon precious samples of air, rock and soil on the Martian surface. Experts are furious

The U.S. needs to set an example for the rest of the world by taking our nuclear missiles off hair-trigger alert and negotiating a reduction of our arsenal