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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.
If you could remove all of your skin, it would weigh up to 5 pounds.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
Blood is approximately twice as thick as water because of the cells and other components found in it.