Cryptic crossword #52: Lizard egg laid in heath (7)
4 March 2021
Challenge your brain by solving New Scientist's weekly crosswords on your mobile, tablet or desktop
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Premium
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Tom Gauld's weekly cartoon
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Become a dangerous diseases hunter by tracing cell structures online
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With the online tool Etch A Cell, you can help biologists identify deadly diseases and make sense of cell images from advanced microscopes
At least the Mary Anning coin doesn’t have a tripod with four legs
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This week’s new questions
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Why can’t humans regrow limbs like an axolotl or a lizard? And do I create gravitational waves when I crash down onto a sofa?
What is the smallest animal with eyes and could it see a molecule? (continued)
3 March 2021
Previous discussion on this topic concluded that it would never be possible to see a molecule without a microscope, but one reader has another idea
What is the evolutionary advantage of birds’ ability to mimic sounds?
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Many birds can remember and mimic sequences of sounds they hear, including human speech, but what benefits does this skill give them? Lyrebirds and drongos could provde the answers, according to one reader
How long is ‘now’, the gap between the past and future? (continued)
3 March 2021
A reader who is a Buddhist monk questions the whole notion of being in the present moment, and others question whether time even exists in the first place.
