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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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.
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.