becauseBecause there is nothing in the way. lookingLooking for stuff in a jungle is difficult because of limitation of vision &and difficulty of moving equipment &and supplies.
lookingLooking for fossils in downtown duckburgDuckburg is difficult because local ordnance prohibits digging big holes.
deserts Deserts, while hostile, are easier to traverse &and cater.
manyMany fossils in the ukUK are found at the beach where the sea &and weather erode the land to expose the treasure, and in mines where people are free to dig to their hearts content.