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Man clicking his heels while mowing a lawn

Does a petrol lawnmower emit more carbon than the grass captures?

The answer is always "yes" according to our readers, unless you're very careful with the grass cuttings

2XHMJ3E Mixed breed dog running through grass with large stick in mouth

This week’s new questions

Is it better to keep a fart or burp in, or let it out?

2C0KN5C Funny husky dog in glasses lying on the grass in a summer park

Is short-sightedness found in other animals?

RBJEJN Woman talking to her baby lying on a bed at home. Mother caring and pampering her baby.

This week’s new questions

2CE6RC8 Drone view over Santorini, aerial view over the whitewashed village of Oia with luxury vacation resort with infinity pools in Santorini Greece

What difference would it make to temperatures if all roofs were white?

Book, reading and relax with teen on bed in home for weekend education, literature or study. Hobby, novel or storytelling with boy in bedroom of apartment for development, growth or learning; Shutterstock ID 2541134517; purchase_order: -; job: -; client: -; other: -

How does the experience of reading a book differ from listening to it?

M5BFWD A man playing a piano outdoors in a public square beside False Creek and the Cambie Street bridge in downtown Vancouver, British Columbia, Canada.

This week’s new questions

Why has crying helped me mourn the loss of my dog, Milou, to old age?

MKC0KM white cat climbing on a tree

Why can squirrels run straight down trees? And could my cat do it too?

A reader explains the adaptations that let squirrels make this gravity-defying manoeuvre - which a cat could only dream of

This week’s new questions

Why do humans like flowers, and do other non-pollinators, too?

Why are at least four faces required to make a flat 3D solid?

This week’s new questions