What is the world's largest fish?
The harmless whale shark holds the title of largest fish, with the record being a 59 footer captured in Thailand in 1919.
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- How much of the body's energy does the brain use?
“About 20%, even though it's only about 2% of body weight. Thinking is expensive.”
Reference: Raichle & Gusnard, *PNAS* (2002)
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