at is cones? cones. correct. $2,800 your new total as you move into second place. $1,000, wildlife. to communicate over distance or in dense brush, rhinos use infrasound, too low for human hearing to detect, because it's below 20 of these frequency units. what are hertz? and before we get to the last two clues, i want to take a moment to thank the wonderful people of south african tourism for extending such great hospitality to sarah and kelly, who visouth africa to record those clues for us. and good news for you folks at home. you, too, could win a saf-- a safari, just like the one enjoyed by the girls, in south africa. we'll have details for you a little later on in the program. dawo clues left. organizations, $800, please.