Cats are famously grumpy, but do they have facial expressions?
What is your pet cat trying to tell you? Readers divine feline thoughts
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How long can viruses survive outside the body?
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This week’s new questions
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Top tips on dealing with lockdown from the Swiss government
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Tom Gauld on when drugs have unusual side-effects
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Humans
Homemade cultured butter is more buttery than normal butter
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Twisteddoodles on when scientists go rogue
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Environment
Rare sighting of European hare wins German nature photography award
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Students break the laws of physics
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What is the reptilian skill that allows lizards to walk upside down?
Readers explain how lizards' feet can stick to walls
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Time for a rhyme
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This week鈥檚 new questions
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Twisteddoodles on an unlikely collaboration between people and nature
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Tom Gauld on trying to get the story of Rapunzel just right
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