1) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.

2) The world's largest desert is the Sahara Desert in Africa, covering an area of about 3.6 million square miles (9.4 million square kilometers).

3) Cows have best friends and can become stressed if they are separated.

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