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Runner man with sports running knee injury. Hands holding knee with painful

Why is pain painful, when it鈥檚 just a nerve impulse like many others?

Pain needs to hurt in order to change our behaviour, say our readers, but it really is all in the mind

healthy toes close up with a human foot with clean nail; Shutterstock ID 2126317208; purchase_order: -; job: -; client: -; other: -

How did prehistoric people cut their toenails? (Part 2)

Hand of man inserting a power cord into an electric car for charging ecofriendly vehicle on green landscape

This week鈥檚 new questions

A man working in the garden.

Humans

How to reap the benefits of crop rotation in your own garden

Society

China finds – then loses – traces of extraterrestial civilisations

Tom Gauld on the science of ducks

Twisteddoodles on the search for a good news story

FEATURE

Life

Fascinating shots of extinct and endangered animals and plants

"Idyllic Waterfall - Source de la Loue, France."

How and where was water first created?

Laughing out loud. Funny animal meme image of happy animals having fun. Hilarious wildlife picture of two beautiful friendly grey seals playing around and apparently joking in the sand.; Shutterstock ID 1270830436; purchase_order: -; job: -; client: -; other: -

Do any other animals have a sense of humour?

Animals find things funny, or at least they seem to, say our readers

Why do I love my dog when there are no evolutionary benefits? (Part 2)

This week鈥檚 new questions

Space

How to catch a glimpse of a five-planet alignment this June

Humans

Is Uttoxeter鈥檚 World Parts Centre the answer to the world鈥檚 problems?