| Quite a workout
It's been estimated that an opera singer burns an average of this many calories per minute during a performance.
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| What a voice
Lauren Bacall's singing voice in her screen debut To Have and Have Not wasn't actually her own.
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| Star light, star bright
How many of the stars in our galaxy have died and produced white dwarfs?
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| Your vote really does matter
A single vote might have been the deciding factor in an historic event taking place in U.S. history.
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| Are you drinking that?
What do people in the arid regions of China wash themselves with due to the scarcity of water?
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| What's in a name
The duffel bag got its name from a town in Belgium.
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| Deadly venom
The venom of the king cobra is so deadly that one gram of it can kill this many people.
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| The universe
Astronomers believe that the universe contains one atom for this many gallons of space.
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| Trademarks
What is the oldest registered food trademark still in use in the U.S. and how old is it?
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| That's really hot
These generate temperatures five times hotter than the 6,000 degrees Centigrade found at the surface of the Sun.
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