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Cryptic crossword #102: Kelvin having a rest, making tools (8)

2 February 2023

Challenge your brain by solving New Scientist's weekly crosswords on your mobile, tablet or desktop

Tom Gauld: Maths puzzles for conspiracy theorists

1 February 2023

Tom Gauld's weekly cartoon

Twisteddoodles on two distinct categories of video observations

1 February 2023

This week's cartoon from Twisteddoodles

COVID???19 virus destruction on a black background.

We must not lose the interest in immune health that covid-19 spurred

1 February 2023

After several months of the covid-19 pandemic, interest in immunity was at an all-time high. Keeping that interest alive is in all our best interests

Do you know where your carrots come from? Science can help if not

1 February 2023

Feedback explores the sad lack – until now – of methods for tracing where carrots come from, while also discovering how to recreate the sound of howling wind with a stick

EX0YM9 Stirring tomato sauce and black pepper in a glass bowl with spoon

This week’s new questions

1 February 2023

What is the most efficient way to stir to dissolve something in water? And is it possible to distinguish sunrise from sunset from a snapshot?

2J7J6G8 Berlin, Germany, May 09, 2022, German Chancellor Olaf Scholz and French President Emmanuel Macron attend a joint press conference at the chancellery in Berlin, Germany, May 09, 2022. This is Macrons first official visit after his re-election. The two leaders will discuss bilateral matters and Russia's ongoing war in Ukraine.(Photo by Omer Messinger)

Why do speakers at public events wave their hands around so much?

1 February 2023

Our readers think that there reasons why public speakers use expansive gestures, from the way our brains are wired to avoiding looking like a robot and keeping the audience awake

A man holds his lurcher dog as the canine excitedly licks and nuzzles with a woman who smiles and strokes the pet.

Is sweat from exercise different from that due to anxiety or illness?

1 February 2023

Not only does sweat have a different chemistry when it arises from stress, illness or exercise, but dogs can tell the difference. And so can super-smellers – people with an incredibly sensitive sense of smell