RIP Messenger: What the Spacecraft Taught Us About Mercury

Messenger’s fate was sealed from the beginning: When it ran out of fuel, the space probe would crash into Mercury, the planet it was sent to observe. What we didn’t expect is Messenger to last four years instead of one. After an unexpectedly long and fruitful mission, Messenger met its inevitable end today. » 4/30/15 5:05pm 4/30/15 5:05pm

NASA to Send Messenger on a Final Trip So Close to Mercury It Could Melt

Over a decade ago, NASA shot Messenger into space, and in 2011, it became the first probe to orbit around Mercury, sending back our first closeups of the planet. But all good things must come to an end, and Messenger is running out of fuel. In one last tour, Messenger will fly lower than ever over Mercury—so close… » 1/05/15 4:15pm 1/05/15 4:15pm

In 2003, half the mercury in U.S. wastewater came from your dentist

Despite how often mercury is commercially employed throughout the U.S., the primary source of mercury pollution in our water supply comes not from heavy industry but rather from a far more dreaded source: your dentist. And the EPA is finally about to do something about it. » 10/03/14 12:10pm 10/03/14 12:10pm