91É«ÇéƬ

While remaining on Earth and living a normal life (no space flight), can a person experience more than 24 hours within the same calendar day, or skip a calendar date altogether?

Marthinus Roos
Elgin, Moray, UK

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Is foam a solid, a liquid or a gas?

James Fenton
Oban, Argyll and Bute, UK

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