Ancient footprints in Tanzania reveal features essential for an upright gait. Read more about our ancestors walking upright earlier than previously believed.
Influx Studio hopes a rare architectural combination of skyscraper, ferris wheel and zoo will inspire Buenos Aires residents to take action that helps wildlife.
On a 16-point scale, each point increase in optimism correlated with a 9 percent reduction in stroke risk, according to a study by the University of Michigan.
A new sub-atomic particle has been discovered by physicists using high-energy collisions at the U.S. national laboratory Fermilab. Read more on the new particle.