The Alpha Magnetic Spectrometer is loaded into the vehicle that would take it to the space shuttle launchpad on March 15. The $2 billion cosmic ray detector will be carried to the International Space Station on Endeavour's final flight. NASA hide caption

itoggle caption NASA

Researchers say that humpback whales are able to swim in remarkably straight lines during their seasonal migrations. They don't yet know, though, how the whales do it. Kike Calvo/AP hide caption

itoggle caption Kike Calvo/AP

Current laws say that truckers are not supposed to work for more than a 14-hour stretch; only 11 of those hours can be driving hours. Advocates of electronic truck monitors say the technology could help reduce highway accidents. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Space shuttle Atlantis lifts off from Kennedy Space Center on May 14, 2010, in Cape Canaveral, Fla. Matt Stroshane/Getty Images hide caption

itoggle caption Matt Stroshane/Getty Images

This concept illustration for the Kennedy Space Center Visitor Complex shows how a space shuttle might be displayed, if NASA decides to award one to the facility. PGAV Destinations/Kennedy Space Center hide caption

itoggle caption PGAV Destinations/Kennedy Space Center

Space shuttle Discovery ended its 39th and final mission to space Wednesday, touching down at Kennedy Space Center in Cape Canaveral, Fla., just before noon local time. John Raoux/AP hide caption

itoggle caption John Raoux/AP

Space shuttle Discovery lifts off at Kennedy Space Center in Cape Canaveral, Fla., on Thursday for the final time. The world's most traveled spaceship is heading toward the International Space Station with a crew of six on a journey that marks the beginning of the end of the shuttle era. Chris O'Meara/AP hide caption

itoggle caption Chris O'Meara/AP

Discovery leaves the International Space Station on June 11, 2008. NASA hide caption

itoggle caption NASA

IBM's Watson computer system competes in a Jeopardy! practice round on Jan. 13 against two of the show's most celebrated contestants: Ken Jennings and Brad Rutter. IBM hide caption

itoggle caption IBM

The Tennessee coneflower is listed under the U.S. Endangered Species Act. A hybrid version of the plant, a cross between the Tennessee coneflower and the purple coneflower, was created in 2003. But experts warn that the new plant could pose a significant risk if it encroaches on the historical range of the Tennessee coneflower. J.S. Peterson/USDA hide caption

itoggle caption J.S. Peterson/USDA

The SpaceX Falcon 9, carrying a Dragon capsule, lifts off the launch pad at Launch Complex 40 at Cape Canaveral on Dec. 8, 2010. NASA hide caption

itoggle caption NASA