human brain oxygen glucose use body weight

The brain uses far more energy than its size suggests

~20% of body oxygen use · ~25% of body glucose use

The human brain makes up only about 2% of body weight, yet it uses about 20% of the body's oxygen and about 25% of its glucose.

Misleading questions can alter memory

Human memory is reconstructive rather than a literal recording. When a question uses misleading wording, people may remember details that were not present. This effect is known as the misinformation effect.

A spinning mercury telescope mirror must always face upward

Spinning liquid mercury naturally forms the curved shape needed for a telescope mirror. Such mirrors can be far cheaper than large solid ones. But liquid cannot be tilted without spilling or changing shape, so the telescope must always look straight up.

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human brain oxygen glucose use body weight

The brain uses far more energy than its size suggests

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