Between the gyres of trash, overfishing, and climate change, our oceans are in a fragile state. But how bad is it? It's hard for regular folks to keep track. So a team made up of scientists from the New England Aquarium, Conservation International, and the National Geographic Society are developing an Ocean Health Index, a single number that'll represent the health of our oceans.Unlike the Dow Jones, which fluctuates constantly, the OHI will be calculated every year. That might make it little hard for people to get a sense of whether things are getting better or worse ocean-wise at any given moment. More frequent feedback would be a better a motivator for the masses. But hell, this is a great idea regardless.Via Peter Smith.