Finding life on extreme conditions on our own planet might gives us a better gauge as to how life might fare on other worlds. The record-breaking discovery of microbes 1.6 kilometers beneath the ocean floor is the latest clue. The microbes are an Archaean species of the heat-loving Pyrococcus which can thrive at temperatures of 100°C, a temperature which would destroy most living organisms.
If the whole universe were a laboratory for testing the resiliency of life, then the sheer number of exoplanets and their moons, which are far greater than the number of stars, would have provided a diverse landscape for life to flourish, thereby increasing the possibility of extrasolar life even more.
Link: Nature News