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Challenge your brain with our weekly puzzles, explore how readers respond to scientific questions, enjoy our pick of the best science, health and technology photography and laugh along with Feedback, our sideways look at the world of science.

Good news for those whose lipstick isn't as soft as they hoped

Feedback brings hope for anyone whose lipstick didn't live up to softness expectations, with news that researchers are finally investigating "deviations from expected lipstick texture"

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Good news for those whose lipstick isn't as soft as they hoped

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What happens to the stains in my sink when I clean it with bleach?

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J773YF Kitchenware on shelves with stainless steel sink in 17th century Kintyre stone cottage

BrainTwister #37: Digital multiplication

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BrainTwister #37: Digital multiplication
2H6020J Few pedestrians on the rather busy street in metaverse conceptual reality

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This week’s new questions

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Hand pouring white wine into a glass from a BIB - cardboard bag in box with open tap standing on a table. Close up image. Copenhagen, Denmark - November 2, 2022. ; Shutterstock ID 2221452919; purchase_order: -; job: -; client: -; other: -

Mathematics

The mathematics behind pouring a glass of wine

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2CG262A Old fashioned street clock with Roman numerals without arrows on blue slightly cloudy sky background. Real view of street clock in city. Stopped time

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What would happen if time stopped?

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Cave diver explores a Mexican sinkhole in atmospheric photograph

Earth

Cave diver explores a Mexican sinkhole in atmospheric photograph

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Tom Gauld on the forgotten elements

Tom Gauld on the forgotten elements

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Twisteddoodles on the dangers of overcitation

Twisteddoodles on the dangers of overcitation

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2JF72KW Digital hands reaching each other, artificial intelligence creativity concept

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Will we ever be able to tell if an AI gains consciousness? Part 2

Our readers have more thoughts on this issue, including what it would mean to buy or sell a conscious intelligence

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Does this title say it all?

Does this title say it all? "Penile injuries from vacuum cleaners"

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hot Jupiter class exoplanet, gas giant planet lit by an alien sun (3d space rendering); Shutterstock ID 1150780133; purchase_order: -; job: -; client: -; other: -

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This week’s new questions

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Passiflora lady margaret.full colour Seeds: Time Capsules of Life Rob Kesseler & Wolfgang Stuppy Papadakis Publisher Publication date: 16th September 2024

Life

Close-up photographs of seeds show their intricate beauty

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2DBWHRA A Atom with electrons and protons moving in the microcosmos.

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Is there the same number of electrons as protons in the universe?

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