8 Interesting Animal Facts Not Too Many People Know November 4, 2022 by Anthony Javaid Elephants have over 300 billion neurons in their brains. This is how big a whale skull is. Just WOW! What an elephant’s tail looks like. Baby giraffes use their butts as pillows. Sloths only defecate once a week and whenever they do, they lose 1/3 of their total body weight. The heartbeat of a blue whale can be as low as 2 beats per minute. The maximum was found to be 37. There’s almost no difference between Elephant foot and Human foot The common basilisk is a species of lizard that can easily walk, and even run, on water.