How come birds in cold countries do not get frozen feet when they walk in the snow? Many birds do not get frozen feet because their feet do not have as much blood as their bodies.
Ducks and geese have a built-in way of keeping their feet from freezing even while they stand on ice. Their feet get very cold, but there is not much muscle or blood in them. The blood in the legs is warmed before it reaches the body.
The chickadee squats down and covers its feet with feathers.
Members of the grouse family grow fringe-like scales along the side of each toe in the winter. These fringes act like snowshoes, helping the grouse to walk on top of the snow.
Who invented binary code which is used by computers? Binary code uses a combination of just two numbers - 1 and 0 - to indicate any piece of information. Its most widespread use is in computers, where the 1 and 0 are represented by two different voltage levels.
The earliest example of binary code was a code invented by Sir Francis Bacon (1561-1626) in 1605. Bacon used just the letters a and b in five-letter combinations to represent all the other letters.