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Last word

New Scientist'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

Farmer harvesting organic rhubarb from her kitchen garden. Rhubarb can be harvested many times through the year. Photographed at an ???off grid??? home on the island of Moen in Denmark. Colour, horizontal format with some copy space.

Last Word

How was rhubarb found to be edible when it tastes bad raw? (Part 2)

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

Last Word

This week’s new questions

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Panoramic view of wind farm or wind park, with high wind turbines for generation electricity with copy space. Green energy concept.; Shutterstock ID 1933377149; purchase_order: -; job: -; client: -; other: -

Last Word

Is there a tipping point when harvesting renewable energy is harmful?

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LIVERPOOL, ENGLAND - APRIL 09: win Randox Grand National Handicap Steeple Chase at Aintree Racecourse on April 09, 2022 in Liverpool, England. (Photo by Alan Crowhurst/Getty Images)

Last Word

Are racehorses aware that they are expected to come first?

Regulars

Issue no. 3437 published 6 May 2023

New Scientist issue 3437 cover
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