Moose spend so much time in water that it prolongs their life. Seriously. Standing around in water all day takes some of the stress off their bones and joints (think water aerobics…lower impact than running, right?), which reduces their chances of osteoporosis and arthritis. Also, just being in a couple feet of water discourages predators like wolves and mountain lions from attacking them, because it’s a lot harder to sneak up on something that’s surrounded by water.