- Pitfall! is a platform video game designed by David Crane for the Atari 2600 and released by Activision in 1982. The player controls Pitfall Harry and is tasked with collecting all the treasures in a jungle within 20 minutes. The world consists of 255 screens which are horizontally connected in a flip screen manner. Each screen has one or more hazards: quicksand, tarpits, rolling logs, crocodiles, snakes, scorpions, campfires, and swinging vines. Pitfall! received positive reviews upon release and is now considered one of the greatest video games ever made. It is one of the best-selling games on the Atari 2600, with over four million copies sold. It was the top video game on the Billboard charts for more than a year, and helped define the flip-screen platform game genre. All versions of the game sold over 5 million copies worldwide.
- I should wish also that such persons were carefully shewn the eleven pellicles which, like so many small valves, open and shut the four orifices that are in these two cavities, viz., three at the entrance of the hollow vein, where they are disposed in such a manner as by no means to prevent the blood which it contains from flowing into the right ventricle of the heart, and yet exactly to prevent its flowing out; three at the entrance to the arterial vein, which, arranged in a manner exactly the opposite of the former, readily permit the blood contained in this cavity to pass into the lungs, but hinder that contained in the lungs from returning to this cavity; and, in like manner, two others at the mouth of the venous artery, which allow the blood from the lungs to flow into the left cavity of the heart, but preclude its return; and three at the mouth of the great artery, which suffer the blood to flow from the heart, but prevent its reflux.