The question lies on whether we are alone in the universe of not. NASA’s top scientist answered it could practically be “no”.
That’s a forgone conclusion. There are billions of stars in the universe and each star has a couple of planets or more orbiting around it. Several of those will definitely have earth-like atmosphere that will support life just as we know it. Even if they don’t, life would still exist which is totally different from ours.
“I believe we are going to have strong indications of life beyond Earth in the next decade and definitive evidence in the next 10 to 20 years,” stated Ellen Stofan on Tuesday , National Aeronautics and Space Administration chief scientist , during a public panel in Washington. “We know where to look, we know how to look, and in most cases we have the technology,”
“It’s definitely not an if, it’s a when.” Jeffery Newmark , an interim director of heliophysics at the agency , stated .
Yet it does not actually mean that scientist are up to finding aliens . “We are not talking about little green men,” Stofan explained . “We are talking about little microbes.”
NASA is certain that they are close to discovering where they will be able to find life in the universe.
One discovery proves it when a study was quoted by Jim Green , the director of planetary science at NASA quoted a study that examined the atmosphere above Mars’ polar ice caps which indicate 50 percent of the planet’s northern hemisphere previously had oceans which is a mile deep and that it contained water for a long duration it could have reached to 1.2 billion years.
“We think that long period of time is necessary for life to get more complex,” Stofan suggested. She added that it would even increase the possibility of finding fossils of past life on planets near earth if human field geologist and astrobiologist could get to Mars.
John Grunsfeld , a NASA associate administrator said he is more thrilled to witness how life would appear beyond our planet.
“Once we get beyond Mars, which formed from the same stuff as Earth, the likelihood that life is similar to what we find on this planet is very low,” he stated . He added that he is convinced that life beyond earth will be discovered by the next generation of scientists and space explorers yet Green expect it to be happen sooner.