Comments from feedback form - "i think if their life on that ..."

There was an article in a recent new scientist that said by judging the pace with which these type of discoveries have occurred (ie if you could plot each discovery on a graph of discovery event significance over time and extrapolate) there was a 50% chance that a 'life friendly' planet would be discovered in the next couple of years and 95% over the next 100 years or so. Looks like they were right haha. Although I think that discussions regarding the ethics of interfering with alien cultures (prime directive) is a tad premature haha