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Last word

New ÒÁÈ˾þÃ's popular Last Word series gives readers the opportunity to answer each other's questions about everyday science phenomena, from the shape of scones to the evolutionary history of toenails. To answer a question or ask a new one, email lastword@newscientist.com

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.

Last Word

If humans colonised Mars, how would they calculate time?

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JMD2WX refreshing lemonade drink with mint lime lemon in garden

Last Word

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: -

Last Word

This week’s new questions

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Issue no. 3444 published 24 June 2023

New ÒÁÈ˾þà issue 3444 cover
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