If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
wild discuss fish
Rods and cones, the photoreceptors in the retina
In the retina, there are two types of light receptor cells: Rods are sensitive to differences in lig
Structure of the retina
Magnified view of the retina as seen through the pupil