 And speaking of their size, we know the giraffe is the tallest animal in the world. It's also the eighth heaviest land mammal. Take a guess. How much do you think the average adult giraffe weighs? Multiple choice? No. Okay, I'm going to say one and a half tons. Well, actually, I think you're pretty close. Is a ton 2,000 pounds? I think so. 2,000? American tons.