Solar aeroplane heads for China
Solar Impulse, the fuel-free aeroplane, heads out of Myanmar and on to China on leg five of its attempt to fly around the world.
- Solar aeroplane arrives in Myanmar
- Solar aeroplane crosses India
- Solar aeroplane sets new record
- Solar plane completes first leg
Porpoises use 'sound searchlights'
Porpoises finely adjust the size of the beams of sound they use to hunt - using sound like a searchlight to trap their prey, a study finds.
Duo begin year-long space trip
US astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko arrive for a 12-month tour of duty on the International Space Station.
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