Pale rider
4 October 2017
Driverless cars are already in existence. Would riderless motorbikes be a possibility?
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Premium
Dead of night
4 October 2017
How do green plants cope with 24 hours of darkness for long periods? Does this affect oxygen production, and in turn cause any problems for local wildlife?
Ever decreasing circles
4 October 2017
Solar systems orbit the centre of their galaxies. Planets orbit stars. Moons orbit planets. Does anything orbit moons? If not, why not?
Getting sucked in
4 October 2017
How close would one have to be to the coalescing black holes recently detected by LIGO to actually feel the gravitational waves without the aid of instruments? (Continued)
