The trick is: how do you talk about natural selection without implying the rigidity of law? We use it as almost an active participant, almost like a god. In fact, you could substitute the word 'god' for 'natural selection' in a lot of evolutionary writings and you'd think you were listening to a theologian.
To shuck oysters, you'll need an oyster knife, a handy tool with a sturdy handle and a short, rigid blade which you can pick up for about ten bucks in a kitchenware shop or fish market. A quick trip online will yield any number of videos and slide shows with step-by-step instructions on how to shuck an oyster.