Since about 2015, Mr. Tyson has been very vocal about science education and scientific literacy. He believes that, for the United States to maintain its preeminence as a nation, it must maintain preeminence in science. He is particularly concerned about denial of evolutionary science and denial of anthropogenic climate change. He produced a video, published on Facebook on April 19, 2017, that states his concerns very directly.<ref>http://www.huffingtonpost.com/entry/degrasse-tyson-science-deniers_us_58f99e89e4b06b9cb91572a1?f1l&ncid=inblnkushpmg00000009</ref> | Since about 2015, Mr. Tyson has been very vocal about science education and scientific literacy. He believes that, for the United States to maintain its preeminence as a nation, it must maintain preeminence in science. He is particularly concerned about denial of evolutionary science and denial of anthropogenic climate change. He produced a video, published on Facebook on April 19, 2017, that states his concerns very directly.<ref>http://www.huffingtonpost.com/entry/degrasse-tyson-science-deniers_us_58f99e89e4b06b9cb91572a1?f1l&ncid=inblnkushpmg00000009</ref> |