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microscope images showing ciprofloxacin-resistant E. coli (credit: University of Oxford)

Health

Become a citizen scientist in the fight against antibiotic resistance

Sign up to a project called Infection Inspection and help researchers confront the rogue microbes that threaten to unleash an apocalypse of untreatable disease

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Is it possible to distinguish sunrise from sunset from an image?

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Happy little kid boy celebrating his birthday and blowing candles on homemade baked cake, indoor. Birthday party for children. Carefree childhood, anniversary, happiness. Five years old; Shutterstock ID 568106428; purchase_order: -; job: -; client: -; other: -

Why does a candle flame go out when we blow on it?

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Would a tug of war be possible between France and England? (part 2)

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Human kidney cross section. 3d illustration; Shutterstock ID 759443860; purchase_order: -; job: -; client: -; other: -

This week’s new questions

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What happened to the male mice that drank lots of cola? Big things

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Tom Gauld: Schrödinger’s dog

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Twisteddoodles on a puzzling experiment

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Earthworm on a mound of dirt on hands; Shutterstock ID 597695612; purchase_order: -; job: -; client: -; other: -

Environment

How to do a health check on your garden’s vital earthworm population

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EX0YM9 Stirring tomato sauce and black pepper in a glass bowl with spoon

What is the most efficient way to stir to dissolve something in water?

Zigzag motions, figure-of-eight and whirling vortices - the best way to stir sugar into a cup of tea isn’t as straightforward as you might think, say our readers

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Why is the noise of aeroplanes louder in colder weather?

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Why are birds mostly monogamous, but not mammals? (part 2)

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This week’s new questions

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Is it a fossil? Is it a beehive? Scientists can’t make up their minds

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