Video: Arithmetic Logic Unit (ALU): Definition, Design & Function. An arithmetic logic unit (ALU) represents the fundamental building block of the central processing unit of a computer. An ALU is a digital circuit used to perform arithmetic and logic operations.
Snake Crawls up a Wall. 02.10.2008 - Many people ask me about the climbing capability of snakes. In particular, people want to know if snakes can get up into their attic. The answer is that yes, some species of snake are excellent climbers, and can climb walls.
HOW FROGS GET AROUND. Some species of frogs prefer to walk or run, but most hop or even leap, up to as much as more than 30 times their own body length! Many frogs with sticky toe pads are excellent climbers. Tree frogs can even climb up a smooth surface like glass.