NASA has selected four proposed Discovery-class interplanetary missions to receive $3 million to flesh out their concepts, with the aim of choosing one or two of them next year for… Read More
STANFORD, Calif. — Are there microbes falling in the snows of Enceladus? Could a drone fly to biological hot spots on Titan? Is life floating in the sulfurous clouds of… Read More
Today Venus is a hellish planet with a crushingly dense atmosphere of carbon dioxide, but billions of years ago, it could have had habitable surface temperatures and a watery ocean.… Read More
For months, scientists have puzzled over weirdly bright spots of material shining on the asteroid Ceres, but now they say the spots are probably made of salty ice. That determination, based on… Read More