女生小视频

OSTRAVA, CZECHIA, JUNE 27, 2023: Play of Light and Shadow on 400m Men's Race Track in Track and Field Meet for Worlds in Budapest and Summer olympic Games in Paris; Shutterstock ID 2345996631; purchase_order: -; job: -; client: -; other: -

Could flatulence-inducing food give a runner jet propulsion?

Our readers aren鈥檛 convinced that the resulting emissions would enable victory in a sprint race

2DAC6P0 Sculpture 'Medics to the World' honouring the health care workers battling Covid-19

This week鈥檚 new questions

A young child has both his thumbs on middle C. There are stickers on each key to guide him through the octaves and notes.

Why do we only use 12 notes in Western music?

2C166J1 Silhouette of a human with skin flora,microorganisms which naturally colonize the human skin - 3d illustration

When I die, what happens to my microbiome?

Side view of a funny cheerful baby girl wearing Santa hat, standing inside a crib in a room during Christmas time.

This week鈥檚 new questions

Many living earthworms for fishing in the soil, background; Shutterstock ID 1932989285; purchase_order: -; job: -; client: -; other: -

Can worms regenerate if they are cut in half longitudinally?

An artist's illustration of the longest black hole jet system ever observed. Nicknamed Porphyrion after a mythological Greek giant, these jets span roughly 7 megaparsecs, or 23 million light-years

What would happen if a black hole jet hit the sun or Earth?

Group of Asian friends having fun enjoying beach camping in summer

Is music an essential part of human evolution? Part 2

J7JGYD Cuban Rock Iguana, Cyclura nubila, Jardines de la Reina, Cuba

This week鈥檚 new questions

CY810A Senior / mature man (aged 71) humorous portrait with prominent bushy wild unkempt eyebrows

Why do we start growing lots of ear, nose and eyebrow hair as we age?

This sometimes copious hair obviously confers no survival benefits, say our readers, so it is unlikely to be down to evolution

How long will it be before the rules for leap years need revision?

This week鈥檚 new questions

Could a huge, prolonged volcanic eruption happen again?

Is there evidence disproving that we are part of a simulation? Part 2