Hunting is the only means of survival in northern Greenland, there being no vegetation to speak of in the icy wilderness. The Inuit are the most permanently settled of the four groups I'd be looking into, but their forays into the untamed Arctic often last for weeks on end. Here,the most bountiful time for hunters comes in a short summer window of opportunity, when the sea ice melts and the narwhals arrive. In the Tenere, where neither hunting nor gathering yields enough sustenanceto survive the burning desert sands, the Tubu rely on trading to support their lifestyle. Like the Inuit's quest for their biggest prize, the Tubu'sannual trek across the dunes is carefully timed, to coincide with the date harvest in the northern oases.