Scientists are using a zeppelin to do a slow search for signs of fragments left by the April 22nd Sutter's Mill meteorite. John Matson reports

Workers who turned off their e-mail had lower stress and did less multitasking compared with co-workers who left their in-boxes open. Sophie Bushwick reports

Dozens of asteroid impacts at least as bad as the dinosaur killer occurred long after such impacts were previously thought to have petered out. John Matson reports

New research finds that keeping a secret can make you feel as if you are physically burdened. Christie Nicholson reports

Gamma-ray bursts can't be the source of ultrahigh energy cosmic rays that reach Earth. John Matson reports

A forthcoming study finds that keeping busy with selfless tasks greatly expands our perception of how much time we have. Christie Nicholson reports

A recently discovered pair of exoplanets may be the wreckage of one formerly giant planet. John Matson reports

Research finds that men are perceived to be strong and large if they are carrying a deadly weapon. Christie Nicholson reports

Starting with Discovery, the decommissioned space shuttle fleet will go on display at museums around the country. John Matson reports

New research has found significant discrepancies between how much people think they weigh and how much they actually weigh. Christie Nicholson reports