Everyone has one nostril that is larger than the other.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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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.
A revised animal phylogeny based on molecular data of SSU rRNA
Jaguar F-type front
Switching of mating type in haploid yeast cells
Kitagawa Utamaro, The Fickle Type, from the series Ten Physiognomies of Women.