NASA/JPL
If they continue on their current trajectories, what is the probability Voyager 1 or 2 will crash into a planet or star in the (distant) future?
Paul Mitchell,
Tregony, Cornwall, UK
Scott Hortop Travel/Alamy
Do people who live in hilly towns have better health than those who live in flat towns?
Derek Johnson,
Moreton-in-Marsh, Gloucestershire, UK
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