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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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.
The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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![Like most world-changing inventions, the printing press of fifteenth-century Europe took advantage o](https://biology-forums.com/gallery/47/medium_6_15_08_15_11_36_37_22214776.jpeg)