Tropical storm Irene illustrates improvements that forecasters have made in forecasting a hurricane's track. But it also highlights needed improvements in forecasting storm intensity.
First came an earthquake in Colorado. Then Virginia's quake shook the US from South Carolina to New England. Finally, San Francisco had a rattler as well. Are they connected?
A new study of the far side of the moon suggests that the Earth once had a tiny second moon, which collided with the bigger one.
Archaeopteryx: The creature long believed to be the earliest known bird may not have been a bird at all, suggests a new Chinese fossil find.
Trojan asteroid: NASA has discovered that Earth has an asteroid companion traveling just ahead of our planet as it orbits the sun. This so-called Trojan asteroid could serve as a stepping stone to celestial objects farther afield.
Satellite Cassini flew through geyser plumes spouting from Enceladus and gathered ice crystals. These crystals are salt-rich, suggesting that a hidden salty sea lurks beneath Enceladus's icy cap.
A study of the genomes of two families has found that the number of mutations thought to occur each generation had been overestimated, suggesting that the pace of human evolution is slower than scientists had thought.
Scientists have found evidence of supermassive black holes at the core of the earliest galaxies, a discovery that could shape theories about galaxy formation.
Voyager 1 has entered a place where the solar wind is no longer blowing. The finding suggests a 'doldrums' on the farthest edge of the solar system that scientists had not forecast.
Scientists at the world's largest particle physics laboratory in Switzerland have found a way to contain antimatter atoms in a magnetic 'bottle' for as long as 1,000 seconds, an eternity in particle physics.