1) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

2) The development of the microprocessor by Intel in 1971 paved the way for the modern computer and led to the exponential growth of computing power.

3) The concept of compound interest can be attributed to the ancient Babylonians, who used it in their banking practices.

4) The Super Bowl is the championship game of the National Football League (NFL) in the United States and is one of the most-watched television events each year.