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Walking highland cattle on sunset, scottish cow; Shutterstock ID 2496920209; purchase_order: -; job: -; client: -; other: -

Why are so many Scottish animals red-headed, from squirrels to people?

Our readers dig into what makes someone 鈥� or thing 鈥� a redhead, and speculate as to what might make red fur useful

H3NTB2 Woman by giant trees in snow-covered forest, Sequoia National Park, California, USA

This week鈥檚 new questions

GKTGNN Formentera, Balearic Islands: an inflatable balloon in the shape of an alien between bushes

If we ever find life on other worlds, will it be based on DNA?

S3W7DX Close up of the large nose and snout of a cow behind bars

Why do our nostrils point down, not straight out from our faces?

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?

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?

This will depend on the type of worm, say our knowledgeable readers, but best to try it with a planariam flatworm if you鈥檙e getting the knife out

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

Is music an essential part of human evolution? Part 2

This week鈥檚 new questions

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