Biology
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Cells, bodies, evolution and everything that grows.
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Why a nerve spike is always the same size: the all-or-nothing action potential
Every nerve signal in your body is the same size. A feather touch and a hammer blow send identical electrical spikes, so how does the brain tell them apart?…
How a Venus flytrap counts to five without a brain
A Venus flytrap ignores the first touch. Brush one of its trigger hairs and nothing happens; brush a second within about half a minute and the jaws slam shut…