Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.
Did you know?
Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Border Collie
Border Collie
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
Pat Gorman and Frank Olinsky, Manhattan Design, Three logos for MTV.
Willem de Kooning, Woman and Bicycle.
Cutaway views of (a) the breast of a woman who is not pregnant and (b) the breast of a lactating wom