By Alyson Foster Content & Collections Specialist, National Geographic Library Welcome to #tbt—ThrowBack Thursday! Today we’re getting geographic (and National Geographic) with a blast from the polar past. Say you’re a sailor or a pilot and you want to get to the North or South Pole. How do you find your way there without getting lost? For those of us living in an age of … Continue reading #tbt: How A Special Compass Helped Richard Byrd Explore the Poles