4.1 million people visited Yosemite National Park in 1996. The Anopheles mosquito , which carries the malaria parasite Plasmodium is responsible for half of the human deaths in history, outside of war and accidents, since the stone age. In 1993 there were an estimated 64 million cats in the United States. In the 1880's Sigmund Freud created a sensation with a series of papers praising cocaine's potential to cure depression, alcoholism and morphine addiction. The snake that is responsible for the most human deaths is the saw-scaled or carpet viper which resides from West Africa to India.
Cats possess an image intensifying device at the rear of their eyes.
This is a light-reflecting layer called the tapetum lucidum , which acts like a mirror behind the retina, reflecting light back to the retinal cells. With this, the cat can utilize every scrap of light that enters its eyes. This is what causes cats eyes to glow at night . The Anatomy Museum of the University of Tokyo Medical School has a collection of over 100 preserved tattooed human skins . The Guillotine , invented in April 1792, was originally designed as a humane way to execute prisoners condemned by the Revolutionary French National Assembly.