Why Don't Penguins' Feet Freeze?

From the phenomenal New Scientist series, with over 2,500,000 copies sold
The second compilation of readers'' answers to the questions in the ''Last Word'' column of New Scientist, the world''s best-selling science weekly. Following the phenomenal success of Does Anything Eat Wasps? - the Christmas 2005 surprise bestseller - Why Don''t Penguins'' Feet Freeze? includes answers to the most fascinating, trivial, idiosyncratic, baffling and strange questions in popular science.
Ever wondered why we have fingerprints? Or whether bumblebees really defy the laws of physics when they fly? And why are eggs egg-shaped? And dogs'' noses black? Why do our eyes water when we cut onions? Why doesn''t superglue stick to the inside of its tube?
Why Don''t Penguins'' Feet Freeze? is popular science at its most entertaining and enlightening.