Aaron Alien/Alamy
When the sun eventually expires and swells to engulf Earth, might the remnants of landfill and deeply buried nuclear waste be recycled to form star dust that will become new planets or life forms?
Steve Haines
Southampton, UK
George Oze/Alamy
Why do some of us enjoy exercising and others don’t?
Richard Grimmer
Trowbridge, Wiltshire, UK
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