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White hydrogen storage tanks with blue H2 labels, set against a blue sky with clouds, symbolizing clean energy. 3D Rendering; Shutterstock ID 2460820695; purchase_order: -; job: -; client: -; other: -

Would using Earth’s white hydrogen deplete our oxygen supply?

Our readers explain why burning our planet's naturally occurring hydrogen won't deplete levels of atmospheric oxygen 鈥� there would need to be far more of it for this to be a problem

JAPAN. Tokyo. Bank near Tokyo Station. 2002.

How much money is gained or lost in computer rounding errors annually?

Male nose close up bottom view - hair in the nostrils; Shutterstock ID 1895123341; purchase_order: -; job: -; client: -; other: -

I see why we have two eyes and ears 鈥� but why two nostrils? (Part 2)

2WA289F The supermoon rise at the Nature Discovery Sanctuary in Winkler, Manitoba, Canada.

This week鈥檚 new questions

HE21RH Chef decorating a meal made of fish

When did hominids start decorating food and do other species do it?

Lola the Cat, behind a window, London

How would our tech development have gone if glass wasn鈥檛 transparent?

13 January 2023, UAE, Dubai: Assortment of Alcohol free beer bottles on a shelf of beverage shop; Shutterstock ID 2279500355; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

EYCC30 Attraction and repulsion iron metal particles align up along the magnetic fields lines created by a bar magnet invisible to see

Could two negatively charged black holes repel each other?

Battle cruiser approaching light speed in an outer space wormhole, 3d digitally rendered illustration; Shutterstock ID 91289105; purchase_order: -; job: -; client: -; other: -

How long would it take to speed up to 99 per cent light speed? Part 2

2CCYRY3 Please Do Not Feed The Horses

This week鈥檚 new questions

Do all languages have the equivalent of 鈥減lease鈥� and 鈥渢hank you鈥�? And how would human civilisation differ if the sun, moon, stars and planets were always obscured?

How can I ensure that most of my body is used after my death?

Why do many animals have white underbellies? Part 2

I see why we have two eyes and two ears 鈥� but why two nostrils? Part 2

This week鈥檚 new questions