Siegfried Fred Singer is an Austrian-born American physicist and emeritus professor of environmental science at the University of Virginia. Singer trained as an atmospheric physicist and is known for his work in space research, atmospheric pollution, rocket and satellite technology, his questioning of the link between UV-B and melanoma rates, and that between CFCs and stratospheric ozone loss, his public denial of the health risks of passive smoking, and as an outspoken critic of the mainstream scientific assessment of global warming. He is the author or editor of several books including Global Effects of Environmental Pollution, The Ocean in Human Affairs, Global Climate Change, The Greenhouse Debate Continued, and Hot Talk, Cold Science. He has also co-authored Unstoppable Global Warming: Every 1,500 Years with Dennis Avery, and Climate Change Reconsidered with Craig Idso. Singer has had a varied career, serving in the armed forces, government, and academia. He designed mines for the U.S. Navy during World War II, before obtaining his Ph.D. in physics from Princeton University in 1948 and working as a scientific liaison officer in the U.S. Embassy in London. 

September 27th, 1924 in Vienna (Age 100)