Via CNN
Earth seems like the perfect hub for life because it's the only planet known so far to host it -- but new research suggests that other planets could have oceans that are even more hospitable, offering life that is more varied than we know it.
Oceanic life on Earth depends on an upward flow, or upwelling, which moves nutrients from the dark depths to sunlit portions where photosynthetic life thrives. More upwelling means more nutrient resupply, which means more biological activity, researchers say.
"We found that higher atmospheric density, slower rotation rates, and the presence of continents all yield higher upwelling rates," Olson said.
"A further implication is that Earth might not be optimally habitable -- and life elsewhere may enjoy a planet that is even more hospitable than our own."
"NASA's search for life in the universe is focused on so-called habitable zone planets, which are worlds that have the potential for liquid water oceans. But not all oceans are equally hospitable -- and some oceans will be better places to live than others due to their global circulation patterns," Olson said. "These are the conditions we need to look for on exoplanets."
More at the link.Current telescopes can't identify exoplanets to test Olson's theory, but ideally this finding could help in developing future telescopes that could seek out types of exoplanets defined in this research.