麻豆传媒

Do all languages have the equivalent of 鈥減lease鈥� and 鈥渢hank you鈥�? Why are these words so important to us?

Adrian Moore

Maidenhead, Berkshire, UK

How would human civilisation differ if the sun, moon, stars and planets were always obscured by clouds?

Simon Rockett

Debenham, Suffolk, UK

To answer this question 鈥� or ask a new one 鈥� email lastword@newscientist.com.

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