When Dan Coslic was 8 he discovered the encyclopedia. What most captivated him among alphabetized foreign cities, inventions from near and far, and countries he’d never heard of, were maps. “I was obsessed with maps as a kid, especially out west where there were mountains on them,” said Coslic, who grew up in Pennsylvania. “I discovered this little symbol that meant ‘highest point in the state’ and I wondered what it would be like to climb the mountains with snow on, what kind of training it would take.”