51动漫

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?

The reason why we unconsciously open our mouth when we open are eyes is more complicated than you might think, say our readers

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?

Male legs and hands Weed Out plant gardening in home garden; Shutterstock ID 2087550862; purchase_order: -; job: -; client: -; other: -

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

illustrating the accelerating expansion of the universe

This week鈥檚 new questions

This photograph is of the sky over north London on Wednesday 15th June at 8:13 am. The picture Is cropped to centre the image. The effect was not due to camera or glass of vehicle photo was taken from and looked identical to naked eye. What can have caused the contrails to end so evenly? No aircraft were immediately apparent, it did turn out to be a remarkable hot day. I am assuming my passenger?s suggestion of a glitch in the matrix leading to an incomplete sky rendering is incorrect- can you or your readers provide a more sensible explanation

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

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

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

2F7R4DY Volume button close-up on TV remote control with braille

Why do even numbers feel 鈥榬ight鈥� to me, and odd ones 鈥榳rong鈥�? (Part 2)

mist, rain

This week鈥檚 new questions

How fast would you have to travel to be able to run on water? And would life on Earth be different if the moon provided no light?

What is the optimal number of holes to pierce a microwave meal鈥檚 film?

Why are the highest peaks of the British Isles so close to the coast?

Do any other animals have a sense of humour? (Part 2)

This week鈥檚 new questions