Biology is less of a long shot on a wet and active Mars
MORE Why Humanity Keeps Putting Off the Trip to Mars A Brief History of the Search for Water on Mars Signs of Water Found on Mars, Researchers Say Mars may be the solar system’s most tragic planet. It once had a dense atmosphere; it once fairly sloshed with water; just one of its oceans may have covered two-thirds of its northern hemisphere. With seasons very much like Earth’s, it could have been home to who knows what kinds of life.
