6 elements: carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur. Everything from Humans to Algae used these components to create its own DNA.
Discovered in California, a previously unknown type of Bacteria, GFAJ-1, uses toxic (to almost everything else considered alive) Arsenic as one of its cellular building blocks. This revelation totally changes the current definition of what is considered life. Who knows if they'll add to it or rewrite it entirely. Click below for the linked source article.
|Mono Lake, CA where GFAJ-1 was discovered living