article_snippet.sent: The announcement was prompted by the recent discovery of water by Nasa in surprising places.
article_snippet.sent: Jim Green, director of planetary science at Nasa, noted that a recent study of the Martian atmosphere found 50 per cent of the planet's northern hemisphere once had oceans a mile deep.
article_snippet.sent: a recent study of the Martian atmosphere found that water had been present on the planet for up to 1.2 billion year. '
article_snippet.sent: Planets with potential oceans could have a climate that is much more similar to Earth's than previously expected,' said Jérémy Leconte, a postdoctoral fellow at the Canadian Institute for Theoretical Astrophysics (CITA) at the University of Toronto. '
article_snippet.sent: '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,' Jérémy Leconte, a postdoctoral fellow at the Canadian Institute for Theoretical Astrophysics (CITA) at the University of Toronto said. '
highlights_snippet.sent: But the likelihood that life is similar to that on Earth is low, Nasa claims .