This week’s new questions
How often should we wash, for health benefits or other reasons, and how much energy is used storing emails?
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Mind
Neuroscientist Sophie Scott on why we laugh and a love of thermostats
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Humans
Angela Saini video interview: The return of race in mainstream science
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Humans
2019 European elections: How to vote if you care about climate change
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Technology
How to be a maker: The complete list of all you need
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Health
How Willem Einthoven gave doctors a window on the heart
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Physics
The kilogram has been transformed as new definition takes hold
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Liana Finck cartoon
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Environment
Deadly air pollution illuminated in beautiful long-exposure photograph
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Feedback: Are we dog-walking into a surveillance state?
Feedback is our weekly column of bizarre stories, implausible advertising claims, confusing instructions and more
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Has all the hardware sent into space affected Earth鈥檚 gravity?
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Kissed by a human or licked by an animal: which has more disease risk?
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Does your fringe grow faster than the hair on the rest of your head?
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This week’s new questions
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