About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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The human body produces and destroys 15 million blood cells every second.
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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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The average office desk has 400 times more bacteria on it than a toilet.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
The Dugong is an endangered species; the largest remaining population is found in Australian waters
The human HLA complex and its different regions.
The human X chromosome (left) and the Y chromosome (right). This false-color scanning electron micro
Opener A human X chromosome highlighted using fluorescence in situ hybridization