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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.