Posted by Emma Woollacott
The Earth temporarily gained a third radiation belt last year, NASA's Van Allen Probes mission has revealed.
Posted by Kate Taylor
NASA's two GRAIL probes have now successfully been placed in orbit around the moon.
Posted by Kate Taylor
The Fermi paradox asks why, if intelligent life is common, no technological civilizations have ever been observed.
Posted by Emma Woollacott
NASA is hoping to launch its twin Grail spacecraft this morning, after a temporary delay because of poor weather.
