How wide is the universe?
Astronomers’ best theory concerning the width of the universe gives a figure of 93 billion light years. The margin of uncertainty is about 10%, so the safe answer is 84 to 102 billion light years. Yet the universe is 13.8
…flies Always Die On Their Backs?
ENTYMOLOGY You may often find dead flies on their backs, but they do not necessarily die that way. Instead, this common death posture is because flies – and many other insects – are relatively light, and crucially their centre of gravity is at the to
