The coronavirus outbreak has moved into a new phase, compelling some state leaders to take the unusual step of closing schools statewide. More states may soon do the same.
NOAA's Commissioned Officer Corps pilots fly special planes and use gamma ray detectors and other equipment to measure ice and snow that will eventually melt into streams and rivers.
To slow the coronavirus, colleges are canceling in-person classes and shifting to online only. How do students and faculty adapt, and what gets lost in the shift away from gathering in classes?
The Earth's entire land mass is being photographed by satellites every single day. Trying to make sense of all these images falls to a U.S. spy agency many have never heard of.
The strikes were "defensive, proportional and in direct response to the threat posed by Iranian-backed Shia militia groups," Pentagon officials said on Thursday.
The U.S. military says it has carried out airstrikes in Iraq against a militia group backed by Iran — one it blames for a rocket attack on a base that killed one British and two U.S. service members.
A failure of sufficient support from President Trump and his allies in the Senate may mean that surveillance tools called essential by the Justice Department could expire this weekend.