The silver anniversary of Roy Spencer's career-defining moment arrived with no expectation in March. He didn't realize it until someone mentioned it to him. For John Christy, he had no idea that a discovery announced in 1990 would not only still resonate 25 years later but would be at the center of a raging debate. The date was March 29, 1990. That was the day they publicly became climate change skeptics. What Christy and Spencer (who then worked for NASA at Marshall Space Flight Center just down the street from UAH) announced at that press conference on March 29, 1990, was that their study of temperature data from satellites indicated the world was not warming as much as was believed. --Paul Gattis, Alabama.com, 1 April 2015
