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Author Question: Which of the following has emerged as one of the most pressing challenges of the early 21st century? (Read 150 times) |
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If you could remove all of your skin, it would weigh up to 5 pounds.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Thyroid conditions may make getting pregnant impossible.
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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.