Durango Herald: As a boy in Arizona, Randy Udall did a “science experiment’ by putting a tarantula and a scorpion together in a Mason jar to see what would happen. He did the same kind of experiment Monday, pitting energy executives against each other in a debate over a large new source of natural gas. Udall is a co-founder of the Association for the Study of Peak Oil-USA and the brother of U.S. Sen. Mark Udall, D-Colo. At Monday’s national peak oil conference in Denver, he tried to make sense …