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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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There are 60,000 miles of blood vessels in every adult human.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Plant cell-to-cell junctions known as middle lamella Plant cell-to-cell junctions known as middle lamella
In middle childhood, children are increasingly able to understand other people’s thoughts, ... In middle childhood, children are increasingly able to understand other people’s thoughts, ...
Place the tennis balls in a sock on the floor behind you, then lie with the middle of your thoracic ... Place the tennis balls in a sock on the floor behind you, then lie with the middle of your thoracic ...
A slave market in Marrakesh, Morocco. This lithograph is from the 1800s. A slave market in Marrakesh, Morocco. This lithograph is from the 1800s.
Cloud Types: Middle Clouds Cloud Types: Middle Clouds
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
Video: Properties of macromolecules (Explained with No Audio)

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