America’s newest capsule for astronauts rocketed Saturday toward the International Space Station on a high-stakes test flight by SpaceX. The only passenger was a life-size test dummy, named Ripley after the lead character in the “Alien” movies. SpaceX needs to …

Scientists estimate half of the world’s corals have been devastated as climate change has led to warmer oceans. When water temperatures get too high, corals become stressed and expel the algae that coats their tissues and provides the corals’ primary …

White House officials are worried that unless more American students study math and science the United States won’t be able to compete with China, India and other nations. The U.S. administration has just published a five-year plan to boost the …

The charity Doctors Without Borders has suspended its Ebola virus-fighting operations in the Democratic Republic of Congo after attacks on two of its treatment centers this week, raising the risk that Ebola infections in the area will increase. The World …

NASA’s newest Mars lander has started digging into the red planet, but hit a few snags, scientists said Friday. The German drilling instrument on the InSight lander hit what appeared to be a couple of stones. It only managed to …