Hello. I'mM.Jackson. Iama glaciologist. Istudyglaciersaroundtheworld. Aglacierisamovingriverofice. ItflowsoverEarth's surface.

Aseracisaridgeoficeonaglacier.Seracscanbefuntoclimb.Acrevasseisacrackinaglacier.Ifellinadeepone,once.Luckily,myteamfishedmeoutof it!