April 29, 2013 Psychologists have long known that children often model their behavior on the actions of parents or peers. But science has only recently begun to measure the influence of siblings. An older brother's or sister's behavior can be very contagious, it turns out — for good and for bad.
April 29, 2013 The space tourism company says the vehicle hit Mach 1.2 and reached 56,000 feet in its first rocket-powered test.
April 27, 2013 Ever want to look back in time? With "time merge media," you can watch athletes dribble, swing and dance, and even throw five pitches at once.
April 26, 2013 Scientists have deployed hundreds of tiny, experimental robots to help with biopsies. They're as small as a speck of dust. They look like tiny ninja throwing stars. And researchers use magnets to retrieve them.
April 26, 2013 An oversight committee halted a big clinical study of an experimental HIV vaccine after a peek at preliminary results showed there was no way the study would be able show the vaccine works. More vaccinated people became infected with HIV than those who got placebo shots.