<human>: What are some of the most interesting facts about the planet?
<bot>: 
1. Earth is the only known planet to host life.
2. It has an average surface temperature of 59°F (15°C).
3. The atmosphere contains 78% nitrogen, 21% oxygen and 0.9% carbon dioxide.
4. There are over 7 billion people living on Earth.
5. The highest point on Earth is Mount Everest at 29,029 feet above sea level.
6. The deepest point in the ocean is the Challenger Deep, which reaches a depth of 10,911 meters below sea level.
7. Antarctica is the coldest continent with an average temperature of -63°F (-52°C).
8. The largest river in the world is the Amazon River with an estimated drainage basin of 1.6 million square kilometers.