NASA scientist Tom Barclay says new discoveries by the Kepler satellite mean habitable planets are no longer just "theoretical":
T. Barclay: These discoveries suggest that there are many habitable, small planets.
T. Barclay: Discussing habitable planets is no longer a theoretical exercise.
More top news
The Republican nominee said that "all she wants to do is campaign" before accusing Mrs Obama of attacking Hillary Clinton.
26 people injured and five people were taken to hospital after a bus crashed into a railway bridge.
Trinity Gay was shot dead in a car park outside a restaurant on Sunday following reports of an exchange of gunfire between two vehicles.