This week’s new questions
20 July 2022
What caused the contrails in the sky to end so abruptly (see picture)? And what is the optimal number of piercings to make in the film covering a microwave meal?
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Premium
Does Earth’s magnetic field affect the weather? (continued)
20 July 2022
New Scientist readers continue to debate the impact of magnetic fields on the weather - including links to a mass extinction event 42,000 years ago
Why are peas green when they grow in the dark inside a pod?
20 July 2022
A pea pod isn’t as dark as you might think, say our readers, and selective breeding has favoured vibrant green peas over yellow or purple ones that occur naturally
Slow breaststroke vs faster front crawl - which is more efficient?
20 July 2022
Front crawl might get you there faster, but breast stroke can be better for a number of reasons, say our readers
