[["Cows, horses, giraffes, and zebras.  Probably a lot more too!", 86.0], ["Many animals sleep standing up, mostly because it is easier for them to stand and sleep than to effort it takes to get up from a lying down position. For animals like cows, lying down actually harms them internally due to squished organs.", 25.0]]
what animals can sleep standing up
animals,mammals,mammal