The black hole at the center of the Milky Way, called Sag A*, is much less active than those at the center of other galaxies. A new study points to a simple answer: heat.
Amid a soaring suicide rate among soldiers, it’s worth looking at how the Army’s aggressive video games distort our impressions of war.
Negotiations on a deal to curb greenhouse gas emissions and head off global warming were suspended Monday morning in Copenhagen, with poorer countries charging wealthier nations aren't prepared to make necessary cuts in CO2 emissions.
The financial reform bill passed Friday in the House spans many markets and regulatory activities. But some experts warn that the economy could remain exposed to bubbles, busts, and firms "too big to fail."
Engineers decode human balance to build walking robots.
New ways of handling air traffic, including 3-D infrared upfront, may cut delays and improve airline safety.
As hope fades for an Iran nuclear deal before the end of the year, UN Security Council members discussed possible sanctions at a meeting in Brussels.
With world-class universities, Boston lures companies eager to tap its high-skilled graduates.