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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Your heart beats over 36 million times a year.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.