Songchai W/Shutterstock
The surface of the oceans is warming, but there must be lots of cold water in the depths. Couldn’t we just stick a giant egg whisk down there and stir things up a bit to solve the warming problem?
Paul Stapleton,
Santa Fe, New Mexico, US
Olga Rolenko/Shutterstock
Are we conscious when we are asleep?
Mike Holden,
Settle, North Yorkshire, UK
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