In past decades, submarines have been trackable by the noises they make underwater, but today, that's changing with nearly silent subs all over the world.
Sea surface temperatures around Florida have been higher than 95 degrees early this summer, and biologists said that without some relief, the rising temperatures could lead to a mass coral bleaching event.
The high seas treaty, once ratified by individual nations, will govern the use of international waters in a bid to protect ecosystems and head off disputes.