I have some outcast questions!

Sin but also I guess anyone else who may know. 1. What are the odds of snake bites? I keep seeing people get bit by snakes looking for idols. Are they just super unlucky, or is it highly likely to be bit? 2. What happens when you click search for idol? I am scared to even click it, because of aforementioned snakebites. But I am curious, when you click does it just say "idol or snake" or is there like a puzzle to solve, or a riddle, or what? 3. Are there two idols at the beginning of the game, like one on each tribe? Or is there just one period and it could be on either tribe? 4. How do merges work? Do you join with another tribe that has also been going, or does your game go to filling and any random person can join? Thank you to anyone who can answer these!!!!