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BIG QUESTIONS
For children of a certain age, there are few things more amazing than blowing out a birthday candle only to have it relight—as if by magic!—soon after the flame has been extinguished.
The lives and livelihoods of these birds revolve around slamming their heads into things. Does it hurt them? Do they benefit from doing so?
What does it really mean when the weatherman says it feels like minus-20 today? Is there a wind chill thermometer somewhere, or is he just using a mathematical formula? Let's answer these and some of the other pressing questions about the ubiquitous winte