1) The world's first car radio was invented in 1929.

2) The Himalayas, known as the "Roof of the World," are home to numerous majestic peaks, cultural diversity, and unique wildlife.

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

4) The fastest land animal is the cheetah, capable of reaching speeds up to 70 miles per hour (113 kilometers per hour) in short bursts.