Scientists at NASA are reporting that a rock sample taken by NASA’s Curiosity Rover indicates that the surface of ancient Mars has all the elements needed to support life, except one.

This team of NASA scientists are indicating that some of the key chemical ingredients that support life, including sulfur, nitrogen, hydrogen, oxygen, phosphorus and carbon, where in the powder that the Curiosity Rover’s drillbit displaced while drilling into a piece of sedimentary rock in close proximity to an ancient riverbed in Gale Crater on Mars last month.

“A fundamental question for this mission is whether Mars could have supported a habitable environment,” said Michael Meyer, lead scientist for NASA’s Mars Exploration Program, part of NASA’s Jet Propulsion Laboratory at the California Institute of Technology (CALTECH) “from what we know now, the answer is yes.”

The missing piece of the puzzle for the discovery of previous life on Mars is water.