|
Author Question: How does brain size at age 5 compare to an adult's brain size? a. 60 b. 90 c. 25 d. ... (Read 76 times) |
The average adult has about 21 square feet of skin.
There are 20 feet of blood vessels in each square inch of human skin.
Your heart beats over 36 million times a year.
Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.