Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
The human oxygen-hemoglobin dissociation curve.
Insect species diversity on British host trees supports the area hypothesis.
Two species of diatoms showing clearly distinct morphologies.
Human arm lever
Major features of human genome
Ant species richness by latitude.