Labor Day weekend is here. That means a retreat to the woods or a beach for some of us. For others it's the perfect moment to hit the couch and gorge ourselves on streaming cinematic adventures (when we're not grilling hot dogs, of course). The good news is there's an incredible variety of compelling science-and-nature-oriented documentaries and series streaming on Netflix right now — from shows that unmask the mysterious depths of the ocean to documentary films that tell harrowing tales of mountaineers risking their lives.