How many dollar bills are in circulation? There are approximately 11.7 billion one dollar bills in circulation in the US, with 8.9 billion 20 dollar bills and 11.5 billion 100 dollar bills. There are about 39.8 billion notes in circulation all together. For coins, there are about 28 billion in general circulation. What are some unusual notes in circulation?
Planet Earth has an abundance of water that makes it unique and perfect for life to exist. Planet Earth has an abundance of water that makes it unique and perfect for life to exist.
Another reason why Earth is unique is that it is the only place in the solar system to our knowledge that has liquid water. Water is one of the key ingredients of life as we know it. The water on Earth's surface covers about 70 percent of our planet and its atmosphere, and it is what makes Earth appear blue from outer space. If you could cut Earth open, you would find that it has a very hot but solid core made up mostly of iron.