dr. tyson's essay for you now. it's called the lincoln seabed. one and a half centuries ago, yet in it's wake, we would kneel at one nation indivisible. during the bloody year of the gettysburg address, president lincoln chartered the national academy of sciences compromised of 50 researchers whose task was then, as now, to advise congress and the executive branch of all the ways the frontier of science may contribute to the health, wealth, and security of it's residents. as a young nation just fore score and seven years old. plunked the fruits of the industrial revolution that transformed europe, but americans had yet to embrace the meaning of science to society. now with more than 2,000 members, the national academy is undreamt of at the time of lincoln's charter. quantum physics discovered in the 1920s now drives nearly one-third of the world's wealth. forming the basis of our commuters revolution. climatology and as we r warm our planet, climatology may be our only hope to save us from ourselves. during the centennial, president carter addres