They also stick there ears out to greet each other. Elephants can hear sounds that are too low for us to hear. They make low rumbling noises that their friends can hear even when they're miles away. It's easy to tell the difference between African and Asian elephants. African elephants weigh more and have bigger ears, and both males and females have tusks.
Asian elephants have small ears and only the males have tusks.
They also have two bumps on their foreheads.