Tom

“Some molecules - ammonia, carbon dioxide, water - show up everywhere in the universe, whether life is present or not. But others pop up especially in the presence of life itself. Among the biomarkers in Earth's atmosphere are ozone-destroying chlorofluorocarbons from aerosol sprays, vapor from mineral solvents, escaped coolants from refrigerators and air conditioners, and smog from the burning of fossil fuels. No other way to read that list: sure signs of the absence of intelligence.”
― Neil deGrasse Tyson, Space Chronicles: Facing the Ultimate Frontier

“When scientifically investigating the natural world, the only thing worse than a blind believer is a seeing denier.”
― Neil deGrasse Tyson, Death by Black Hole: And Other Cosmic Quandaries

“Curious that we spend more time congratulating people who have succeeded than encouraging people who have not.”
― Neil deGrasse Tyson