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Life on other planets could exist.
Follow the water. That's the mantra astrobiologists have been chanting about the search for life on Mars. But even if they do follow the water, will they recognize Martian life when they're looking right at it? Some believe that the current search for life is very Earth-centric - our knowledge of life's limits on our own planet sets our expectations for what we might find in the rest of the Solar System. But life on other planets could exist at such extreme conditions, that many areas on Mars could be worth searching.
Scientists think that Saturn's Moon Titan holds many answers to the early evolution of life in our Solar System. When NASA's Cassini spacecraft arrives at the Ringed Planet, it will release the ESA's Huygens probe which will help analyze the primordial soup of material on Titan's surface. The spacecraft will help determine which organic molecules and their quantities are present in moon's atmosphere. The conditions on Titan have long since passed on Earth; by gathering data there, scientists can help build up a better understanding of what happened during our planet's early history.
It was only a few years ago that Astronomers shook up current models of the universe with the theory of dark energy; which says that the expansion of the universe is actually accelerating. But new evidence gathered by the ESA's XMM-Newton X-ray observatory has cast some doubt on the theory. By looking at distant Galaxy clusters - up to 10 billion light-years away - the ESA Astronomers found they contained more concentrated matter than the theory of Dark energy would predict. If matter was so concentrated, the universe can't be 70% dark energy.
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