It's not news, as it's a couple of years old, but a story about giant ground sloths digging out a massive tunnel in South America is making its rounds around the Internet again and it's just incredibly impressive. Researchers didn't know what had made the tunnel before finding the claw marks in it, which indicated that they may have been dug by giant ground sloths.
This is so incredible. We can picture giant ground sloths but to see something they made still in existance! We have a small museum with a model of a life-sized Megatherium where we can visit and imagine what it was like, but to walk through tunnels that it made... doesn't that just blow your mind?
What other incredible things do you know that animals have made? Share them in the chat.