In a much publicized press conference on Monday, NASA revealed that liquid water has been discovered on Mars.

After studying images from NASA’s Mars Reconnaissance Orbiter (MRO), a spacecraft the orbits the planet, scientist determined that the planet contains liquid water.

The images from MRO showed dark slops on a Martian crater, known as recurring slope lineae (RSL) that would flow through the planet’s seasons. After study images of RSL scientists determined that dark images indicated liquid water under Mars’ surface.

“There have been no evidence for water until now,” said Michael Meyer, the lead scientist for the Mars Exploration Program at NASA. “It is through the multiple spacecraft and the multiple years of observation that we’ve been able to make this discovery of water on today’s Mars.”

Scientists have been aware of hydrate salts on the planet since the 1970s, but it was only recently they could confirm that the salts contained liquid water.

“Today’s announcement, of a really fascinating result about current water on Mars, is one of the reason I feel it is more imperative that we send astrobiologist and planter scientist to Mars to explore the question, is there current life on Mars,” said John Grunsfeld, former astronaut and associate administrator for the Science Mission Directorate at NASA.

Mars One, a non-profit organization has a trip planned to Mars in 2020 while NASA is planning a Mars visit in 2030.