Did you know Australia was home to megafauna 40-50,000 years ago? They were huge! Our Giant Wombat, which is very appropriately named, was a wombat that stood taller than an adult. So too did our largest kangaroo, the Procoptodon.
If these facts are terrifying to you, it's okay. They went extinct around the time humans arrived here, so they have your back. So does the chat onebox mechanism, which will handily erase all terrifying facts.
But really, the chat probably shouldn't do that. They are extinct, and we can handle it.