A group of images captured the tense moment a fearless explorer Will Gadd, 52, hung by just an ice pick as he climbed one of the world's largest ice sheets. He is also the first person to climb up frozen Niagara Falls. /VCG Photo

Will Gadd traveled to Greenland with glaciologist and Professor Jason Gulley at the University of South Florida in an attempt to collect global warming data. /VCG Photo

They wanted to dig into the ice cap in the Paakitsoq region of Greenland, and then hit the water table inside the glacier, diving even further to gain a better understanding of how ice caps move and melt. /VCG Photo

Although Will Gadd has many experiences to the problematic situations, the Canadian adventurer undertook his most significant and most dangerous challenge in Greenland. /VCG Photo