New evidence points to the evolution of the ability for bacteria to grab nitrogen from the atmosphere some 3.2 billion years ago, about 1.2 billion years earlier than thought—with implications for finding extraterrestrial life. Lee Billings reports
Stars Reveal Hidden Galaxy
A dwarf galaxy near the Milky Way may consist of more dark matter than regular matter.* Clara Moskowitz reports
Space Science Budget Gets Small Lift
NASA has to deal with the unexpected financial consequences of robotic missions that just keep going. Lee Billings reports
5 Rocky Planets Found in Ancient, Distant Solar System
The oldest group of terrestrial worlds now known formed some 11.2 billion years ago, more than six billion years before our sun and planets. Clara Moskowitz reports
Long-Lost Lander Found on Mars
New images from a NASA orbiter reveal Beagle 2’s final resting place. Lee Billings reports