Spiralling backwards
If there's no friction in space, why do the arms of spiral galaxies sweep backwards?
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Feel the heat
We sweat to cool our bodies by evaporation, but when we wipe the sweat away 鈥� a natural reaction in humans 鈥� are we defeating that function and making ourselves hotter? Do we also hasten dehydration by making our bodies sweat more, to replace what we've wiped away? In other words, should we just leave the sweat to do its job?
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Blow Out
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I spy ewe
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A degree of uncertainty
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Bright spark?
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