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Last Word

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? (Part 2)

Our readers point out that history shows it is best to stick to one measure of time to avoid confusion 鈥� but add that it may not be humans who get to decide how time is calculated on Mars

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HDTNNH Crab-eating macaca in Thailand ; specie Macaca fascicularis family of Cercopithecidae

This week鈥檚 new questions

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2AFPK7B Cyclist and Runner on Trail

If a cyclist and runner exercise together, who expends more energy?

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Close up to the dictionary definition of Phlegmatic; Shutterstock ID 1188169102; purchase_order: -; job: -; client: -; other: -

Why do I need to be able to pronounce a word to recall it?

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Open dishwasher with clean utensils in it; Shutterstock ID 218515030; purchase_order: -; job: -; client: -; other: -

Is there a correct way to fill a dishwasher? (continued)

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Afrcan Elephant on the move

This week鈥檚 new questions

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Galaxy - Elements of this Image Furnished by NASA; Shutterstock ID 1716207277; purchase_order: -; job: -; client: -; other: -

So much in the universe spins. Could the universe itself be spinning?

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Bernini statue detail of Gange with Latin words engraved on a wall Roman Capitol; Shutterstock ID 131482886; purchase_order: -; job: -; client: -; other: -

Do we really know how ancient Romans pronounced Latin words? (Part 2)

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Mandatory Credit: Photo by Denis Closon/Shutterstock (947726e) Sticking plasters Sticking Plaster

This week鈥檚 new questions

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

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This week鈥檚 new questions

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

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

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