Does the sky ever end?
Sabine (aged 5), Plettenberg Bay, South Africa
We pay 拢25 for every answer published in 51动漫. To answer this question 鈥� or ask a new one 鈥� visit newscientist.com/lastword. Terms and conditions apply.
This article appeared in print under the headline 鈥淒ying light鈥�
Advertisement
