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DRE532 Elephant (Loxodonta africana) waving its trunk sitting in the waterhole of Gwarrie Pan, Addo Elephant Park, South Africa

Why do humans have pubic hair? (Part 2)

The previous answers to this question discussed the protective effects of pubic hair, but could the reason we have it be down to smell?

This week鈥檚 new questions

Trip to the moon (lunar) concept - Long exposure night time rocket launch with solar eclipse "Elements of this image furnished by NASA" ; Shutterstock ID 1937796442; purchase_order: -; job: -; client: -; other: -

What happens if I shine a torch when moving at the speed of light?

Mandatory Credit: Photo by Ryan Browne/Shutterstock (13048564cx) Eilish McColgan of Scotland celebrates victory in the Women's 10,000m final Commonwealth Games 2022, Day Seven, Birmingham, UK - 3 Aug 2022

Can the drag of hair tied in a pony tail slow down elite runners?

This week鈥檚 new questions

2GPFM5E Child in green jacket looking at rainbow over an ocean

Why do I see extra colours bands below the typical bow of a rainbow?

Impressed young asian woman talking on phone with girlfriend while putting mascara in front of mirror at home, sharing rumors; Shutterstock ID 1793035801; purchase_order: -; job: -; client: -; other: -

Why do we open our mouths when we put on mascara?

Portrait of white cat with crown on head sitting on bed, Namibia.

This week鈥檚 new questions

FTTG61 Ball of white heavy thread isolated on white

Could a word on ball of string be deciphered if the ball unravelled?

Young african man sitting at airport lounge and sleeping, waiting for flight at airport departure area.

Is jet lag worse if you travel east rather than west?

Our readers, including a pilot, explain why direction of travel does impact jet lag - and offer tips to overcome it

What stops us from processing weeds into tasty and edible food? Part 2

This week鈥檚 new questions

Why do some contrails run in parallel and end abruptly in the sky?

Why do we have pubic hair but other animals, like elephants, don鈥檛?