John Muir in Alaska
b'He was eager to explore Glacier Bay, take notes and map the coastline 200 miles north. They pushed through ice floes in a dugout canoe. He explored Taylor Glacier, nearly falling to his death in a crevasse, but proved that the glacier was growing and later helped create Sequoia, Mount Rainier and Grand Canyon national parks.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices'