We are certainly beginning to learn that life is more ubiquitous, persistent and diverse than previously imagined.
In Adding Up the Odds for Life, Astrobiology Magazine briefly discusses a proposal launched at the European Planetary Science Congress this past week to develop an equation that will allow astrobiologists to quantify an estimate of habitable planets, based on specific, measureable criteria. A similar analysis appears in Science Daily. For the original European Planetary Science Congress press release, see New Drake Equation to Quantify Habitability? at EuroPlanet Outreach.
In an item of related interest, see also Exotic Life Beyond Life? Looking for Life as We Don’t Know It.