as we hike towards the mighty Miraach Glacier high in the Swiss Alps. >> So, we can see the glacier now. >> There it is.>> Yeah. >> Even in its relatively diminished state. >> It is extraordinary.>> As we near 7,000 ft, the air gets thinner. We're on the heels of scientist Leo Hosley doing his PhD work at Mortaratch. As we make the final scramble up.>> Wow. The sound of that. >> Yeah.We hear it before we see it. >> This is amazing. >> Made it.>> That's cold. >> That's very cold. >> Yeah.It's a really appare ...