Marco's Tooth

"Surely you're not frightened of death, Padre," Galley shouted down at me, pitching his voice to cut through the white noise clouding every transmission. He gestured mockingly with one hand and leant into the terrible pull of the planet.
I ignored him, gritted my teeth and kept climbing. Afraid, no. Terrified. Death drove me on -- well, one man's death at least -- and it had led me here.