1) In Hindu mythology, the Bhagavad Gita is a sacred text that contains a conversation between Prince Arjuna and the god Krishna, who serves as his charioteer. It delves into philosophical and moral dilemmas and provides guidance on duty, righteousness, and the path to spiritual enlightenment.

2) The Great Barrier Reef in Australia is the largest living structure on Earth and can be seen from space.

3) The human body contains enough carbon to make over 9,000 pencils.

4) The word "mountain" contains three vowels: O, U, and A.