Reuters - Hundreds of volunteers on the surging Mississippi River piled sandbags atop strained levees on Tuesday as the worst Midwest flooding in 15 years delivered a blow to the U.S. economy and world food prices.

LiveScience.com - Chimps and orangutans plan for the future just like us.

AP - A Chinese forestry official said Tuesday that giant panda habitat in China's Sichuan province, the endangered animal's main preserve, was devastated by last month's massive earthquake.

Reuters - Massachusetts Gov. Deval Patrick signed a bill on Monday that will direct $1 billion of state funds toward biotechnology over 10 years, aiming to fill a federal funding shortfall caused by White House opposition to embryonic stem cell research.

AP - Scientists at the Smithsonian Institution's National Zoo have revealed they reversed a vasectomy on an endangered horse to allow it to reproduce naturally — the first-known operation of its kind on an endangered species.

AP - The chairman of the Federal Communications Commission says he is satisfied the $3.8 billion merger of the nation's only two satellite radio companies is in the public's interest, but that's no guarantee the deal will win final approval.

AP - Soldiers scrambled to shore up soggy levies with sandbags Tuesday in southern China as forecasters warned that more heavy rain in the central region could trigger flooding on the country's second-longest river. The death toll rose to 171, state-run media said.

AP - European astronomers have found a trio of "super-Earths" closely circling a star that astronomers once figured had nothing orbiting it, demonstrating that planets keep popping up in unexpected places.

AP - Is the white stuff in the Martian soil ice or salt? That's the question bedeviling scientists in the three weeks since the Phoenix lander began digging into Mars' north pole region to study whether the arctic could be habitable.

AP - For most folks, a nice hug and some sympathy can help a bit after we get pushed around. Turns out, chimpanzees use hugs and kisses the same way. And it works. Researchers studying people's closest genetic relatives found that stress was reduced in chimps that were victims of aggression if a third chimp stepped in to offer consolation.

AFP - Crude oil rocketed to a record high of almost 140 dollars a barrel Monday despite news that Saudi Arabia was ready to raise output to help cool soaring energy costs threatening economic growth.