1. Mark took part ....... Several expeditions to the summits
2 A scientist who tries to figure ..... A way........ Cure cancer is also a kind of explorer
3 many of early female explores didn't worry ..... Hunger of fatigue
4 Chris laughs ......... Danger she has no fear
5 Jake participated ........ A 500-mile
6 Arlene Blum has carried........ Many mountaineering