sigh*. Yet another argument from incredulity. Just because you find it unbelievable that something you think is mathematically near impossible does not mean it does not happen. Especially given the fact that you're misrepresenting the process. This is the problem with disseminating scientific terms to an undereducated public with only the barest explanation of what the terms actually mean. 'Not directed does not mean 'random. It doesn't mean 'it just happened. It happened in response to the environment, not because it was directed to do so by some 'other.'