Nicholas Kristof: “But for a really nifty Father’s Day gift, how about sponsoring a rat?…A Dutch company, Apopo, has trained these giant rats, which have poor sight but excellent noses, to detect landmines in Africa. The rats are too light to set off the mines, but they can explore a suspected minefield and point with their noses to buried mines. After many months of training, a rat can clear as much land in 20 minutes as a human can in two days.”