92 million rods and 4.6 million cones · All Facts

92 million rods and 4.6 million cones
An average human retina has about 92 million rods and 4.6 million cones.
SrcCurcio et al., Journal of Comparative Neurology

Next evidence →do not share identical fingerprintsIdentical twins do not share identical fingerprints — ridge detail is shaped by conditions in the womb, so even monozygotic twins remain distinguishable.

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120 daysHealthy red blood cells circulate for up to about 120 days before the spleen and liver clear them.
red blood cellsThe spleen filters blood in its red pulp — trapping and recycling aging or damaged red blood cells.
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hiccupsThe diaphragm is the main muscle of breathing — and sudden spasms of it cause hiccups.

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