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  Science   28 Jun 2017

Science, 28 Jun 2017

Are asteroids humanity's 'greatest challenge'?

Astrophysicists monitoring the risk classify objects into sizes ranging from a few millimetres to behemoths 10 kilometres.

28 Jun 2017 5:03 PM

Uranus' magnetic field flips on and off like a light switch

The US made the discovery based on the data from NASA's Voyager 2 spacecraft that sped past Uranus in 1986.

28 Jun 2017 3:43 PM

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