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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

This battery-powered tester uses light-emitting diodes (LEDs), meter lead terminals, and two small ... This battery-powered tester uses light-emitting diodes (LEDs), meter lead terminals, and two small ...
A meter lead connected to a T-pin that was gently pushed along the signal wire of the TP sensor ... A meter lead connected to a T-pin that was gently pushed along the signal wire of the TP sensor ...
Lead leaching from electronic waste (e-waste) Lead leaching from electronic waste (e-waste)
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. ...
If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ... If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ...
Key foreign policy agencies Key foreign policy agencies
Video: Action potentials - electrical characteristics and generation

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