The rock found in Morocco was even weirder than it looked. The olive green chunk, speckled with white and brown, has chemical and physical properties similar to the planet Mercury. But some experts doubt that the 4.56-billion-year-old meteorite is from the planet closest to our sun.

An obscure tax provision crafted for drug dealers is giving state-licensed medical marijuana dispensaries a headache. Federal income tax rates for dispensaries in Colorado can soar to 70 percent because businesses can’t claim certain deductions. It’s a policy the industry is trying to change.

Pentagon officials say they’re opening ground combat jobs to women as a matter of equality. But the military also needs them because the number of military-age men who qualify for service is declining.

Wyoming has the highest suicide rate in the U.S., and two thirds of the state’s suicides are by firearm. Like much of the West, Wyoming’s gun ownership rates are high, and gun culture is strong. The state’s relationship with guns has made suicide prevention efforts tough, but that may be changing.

Over a long and sometimes troubled career with bands like Songs: Ohia and Magnolia Electric Co., Jason Molina’s songs made pain tangible and less terrifying.

U.S. and other NATO troops are spending less time fighting the Taliban and more time making local Afghan governments self-sufficient. It’s a slow process.

Early March is when Yosemite National Park officials would normally be gearing up for the busy tourist season. Instead, they’re figuring out how to cut $1.5 million from their budget because of the recent sequestration that forced across-the-board cuts. The National Park Service must now cut $134 million from sites around the country.

Federal health officials warned that a dangerous group of superbugs has become increasingly common in hospitals throughout the past decade. The Centers for Disease Control and Prevention says the bacteria are resistant to virtually all antibiotics, including the ones doctors use as a last-ditch option.