1) The process of nuclear fusion powers the sun and other stars, fusing hydrogen atoms together to form helium and releasing vast amounts of energy in the process.

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

3) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.

4) The world's most expensive car is the Bugatti La Voiture Noire, which sold for over $18 million.