In 1864, the first barbiturate (barbituric acid) was synthesized.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Everyone has one nostril that is larger than the other.
18 weeks old human fetus
The surface of the human brain
A Global Bloom: Cities With Over One Million Residents