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Loch Ness Monster: Sonar probe discovers mystery object in the depths of Loch Ness (photo)
The Loch Ness Monster has been the subject of debate for centuries, with numerous sightings down the years
Moon safe for long-term human exploration, first surface radiation measurements show
Astronauts on the Apollo missions of the 1960s and ’70s carried dosimeters to measure their radiation exposure
Elon Musk says humans must leave Earth because Sun will engulf our planet
Musk said that becoming a multi-planet species would allow human civilization to dodge extinction events that had affected other species