午夜福利1000集合

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This mosaic of Mars is a compilation of images captured by the Viking Orbiter 1. The center of the scene shows the entire Valles Marineris canyon system, more than 2,000 miles (3,000 kilometers) long, 370 miles (600 kilometers) wide and 5 miles (8 kilometers) deep, extending from Noctis Labyrinthus, the arcuate system of graben to the west, to the chaotic terrain to the east.

If humans colonised Mars, how would they calculate time?

Humans would have to adjust to the slightly longer Martian day, say our readers, who also point out that time is a human construct, anyway

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JMD2WX refreshing lemonade drink with mint lime lemon in garden

Why did ice in my drink in Spain take longer to melt than at home?

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Bengal cat washing itself on bed; Shutterstock ID 1123136123; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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Tom Gauld on a professor in disguise

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Twisteddoodles on inventing a new type of washing pod

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R126CH Unrecognisable woman in casual clothing holding a box of used coffee ground to use as compost in her garden.

Life

Why used coffee grounds may be doing your plants more harm than good

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MNN37P Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies are: the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

Will there ever be a time when all our solar system鈥檚 planets align?

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R2YAK1 Professional washer in black uniform and cap wiping with sponge car wheel of a luxury car during the washing process outdoors

Why are the front wheels of my car much dirtier than the rear ones?

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Could land-dwelling octopuses develop technology? (Part 3)

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T4AEYJ Stellar explosion shining in deep space, cosmic star blast in Universe. High resolution galaxy background.

This week鈥檚 new questions

If time started at the big bang, is it ever likely to come to a halt? And why do almost all vertebrates have tails, even when they don鈥檛 seem useful, but not apes or frogs?

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An intellectually delicious recipe for electric meringue

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Earth

See some of the images up for the Earth Photo 2023 competition

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Tom Gauld: Science fiction author or tech company boss?

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Twisteddoodles interprets science news

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