Carl Sagan, the astronomer and writer, would have turned 90 today. When I was seven, I watched Cosmos on PBS with my dad. In many ways, I credit my atheism to this formative experience. (Also formative, the Ichthus Christian music festival, but that doesn’t have anything to do with Sagan.) Sagan died in December 1996,Continue reading “Carl Sagan, on His Ninetieth Birthday”