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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Did you know?
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.