1) Orchids are one of the largest families of flowering plants, with over 25,000 species.

2) The New England Patriots and the Pittsburgh Steelers hold the record for the most Super Bowl wins, with six championships each.

3) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.

4) The world's largest diamond, the Cullinan, was discovered in South Africa in 1905 and weighed over 3,000 carats.