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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
There are more nerve cells in one human brain than there are stars in the Milky Way.
About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.
Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
![A woman in a net on a Congo shore. Although the importation of slaves was illegal after 1807, histor](https://biology-forums.com/gallery/47/medium_375552_19_08_15_9_09_52_223212491.jpeg)
![Dred Scott and his wife and children are featured on the cover of Frank Leslie’s Illustrated Newspap](https://biology-forums.com/gallery/47/medium_375552_19_08_15_9_26_03_223392320.jpeg)