1) The first commercial mobile phone, the Motorola DynaTAC 8000X, was released in 1983 and weighed nearly 2 pounds.

2) The most-watched television event in the United States is the Super Bowl, with millions of viewers tuning in each year.

3) Lightning strikes the Earth about 8 million times a day.

4) The word "yesterday" contains three vowels: E, A, and A.