Patricio Nahuelhual/Alamy
Will my tea cool more quickly if it is left out at room temperature, or if my hands are cupped around the mug?
Rafi Berke,
London, UK
Shutterstock/Mike Guinto
Why do victims of violent attacks sometimes take no immediate action, and how can we learn to react appropriately?
Peter Slessenger,
Reading, Berkshire, UK
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