Bill Gate's charity work is too great to list in its entirety, but we tried anyway. On his birthday, we celebrate a great man's most meaningful achievements.
Jadav Payeng, known as the Forest Man of India, spent 30 years of his life planting trees to save his island, creating a forest and restoring wildlife in it.
The Maya are one of the most fascinating long-lost civilizations around the world. Although the population is now long gone, the evidence of their sophistication survives today.