Oldest known primate skeleton found in China in 2002. While not part of human lineage, this little creature does provide tantalizing clues to our earliest history.
Scientists have designed and tested an all-solid lithium-sulfur battery with approximately four times the energy density of conventional lithium-ion technologies.
Many find the story of free-ranging horses on U.S. federal lands heart-breaking. Others don't. A new report recommends birth control for wild horse populations.
Track left behind by ES-5 Moore-Newcastle, Oklahoma tornado on May 20, 2013. The tornado took at least 24 lives, injured hundreds and damaged 13,000 structures.
El Reno, Oklahoma tornado on May 31, 2013 is now widest ever recorded in the U.S. at 2.6 miles (4.2 km) wide, according to the National Weather Service.