The Curiosity Mars rover has traveled 1.8 million miles (about 3 million km) per day. It's measuring space radiation possibly harmful to Mars-bound astronauts.
Leon Lederman - Nobel laureate in physics - describes a hypothetical particle, the Higgs boson, that might one day help explain the structure of the universe.
The brains of tiny spiders are so large that they fill their body cavities and overflow into their legs. Scientists studied the smallest spiders in the world.
Earthquakes, including the 2010 temblors in Haiti and Taiwan, might be triggered by tropical cyclones (hurricanes and typhoons) according to a new study.