91色情片

MTETTE A children's playground in Paris, France

What makes the slipperiness of slides vary so much from day to day?

The variation in slipperiness of slides in children鈥檚 playgrounds could be due to clothing, wetness or even ice-cream, according to our readers

B43AH9 Copper saucepan with steam

Taking near-boiling water off the hob immediately creates steam. Why?

E6BAMW Green peas

This week鈥檚 new questions

Japanesa milk bread

Humans

How science can help you bake a loaf of bread that stays softer longer

Humans

Last chance to buy a pickled cockroach full of moon dust

Tom Gauld looks into the Journal of Palm Tree Studies

Twisteddoodles on a campaign to stop using fossil fuels

FEATURE CROP The global winning image was taken by Jan Martinek (Czech Republic). Arabidopsis thaliana flower with pollen tubes growing through the pistil. The flower tissues were chemically cleared to become transparent, while the pollen tubes were stained with aniline blue (yellow fluorescence) in order to be seen.

Life

Dazzling close-up images of the natural world, from flowers to flies

colored vowels in clay with white background; Shutterstock ID 1579046926; purchase_order: -; job: -; client: -; other: -

Why are there more consonants than vowels in alphabetic languages?

Mandatory Credit: Photo by FLPA/Shutterstock (9110614a) Grey Wagtail (Motacilla cinerea) adult female, breeding plumage, perched on moss covered branch, calling, Suffolk, England, May Nature

Why do wagtails constantly wag their tails?

Constant tail wagging could help with catching insects, or to deter predators

This week鈥檚 new questions

Humans

When the scientific publishing industry goes rogue

Humans

Do your own experiment to see if your teabags really are compostable

Tom Gauld on how far a telescope can see