麻豆传媒

People say 鈥渓aughter is the best medicine鈥�, but does it actually help?

Kush Modi (age 11),

Santa Clara County, California, US

I live near Gatwick airport and am so used to the noise of planes that I rarely notice it. However, during a recent cold spell, the planes were a lot louder than usual. Why would this be?

Kieran Evans,

Horley, Surrey, UK

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

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