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Last Word

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?

When multiple planes fly through adjacent air layers that differ in humidity and temperature, this can leave evenly spaced contrails that end suddenly, say our readers

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

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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)

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mist, rain

This week鈥檚 new questions

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Woman Putting TV Dinner Into Microwave Oven To Cook; Shutterstock ID 234670651; purchase_order: -; job: -; client: -; other: -

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

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June 4, 2022. Scotland, Great Britain. Beautiful mountain landscape.; Shutterstock ID 2171224787; purchase_order: -; job: -; client: -; other: -

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

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Laughing out loud. Funny animal meme image of happy animals having fun. Hilarious wildlife picture of two beautiful friendly grey seals playing around and apparently joking in the sand.; Shutterstock ID 1270830436; purchase_order: -; job: -; client: -; other: -

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

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Large group of people on the move, some shopping, some holding hands, others just walking along.

This week鈥檚 new questions

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Funny little girl watering from a hose flowers in her home garden. Rural life. Happy child is resting in the summer, playing with water and watering the greens with a hose evening; Shutterstock ID 2138202117; purchase_order: -; job: -; client: -; other: -

What is the best angle to hold a hosepipe at to spray water furthest?

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EG8YTA Rugby player breathing during cold weather

What percentage of carbon dioxide emissions is from us breathing out?

Our readers point out that humans exhale a tiny fraction of the total carbon dioxide emitted by fossil fuels

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Does anything actually cure hiccups? (Part 2)

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This week鈥檚 new questions

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

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What determines fingerprints?

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