RT @newscientist: The comet drilling mission has been cancelled today as Philae is unstable http://t.co/ZlfokgWhAX ow.ly/EcGCX #CometLanding
RT @newscientist: The comet drilling mission has been cancelled today as Philae is unstable http://t.co/ZlfokgWhAX ow.ly/EcGCX #CometLanding