In a news conference Thursday, NASA confirmed that they found a type of bacteria with a DNA makeup that we never thought possible.
NASA discovered this bacteria in the depths of Mono Lake in California's Mono County, one of the world's most naturally concentrated sources of arsenic. In fact, the bacteria doesn't present all the essential building blocks of life – carbon, nitrogen, hydrogen, oxygen, phosphorus, and sulfur. Instead of phosphorus, the bacteria's DNA uses arsenic.
The discovery that a life form can be comprised of something other than these six fundamental components changes our whole understanding of life itself. This points to the possibility of finding beings in other planets that are different than beings on earth.