Think you know everything there is to know about twins? I bet you didn't know all of these fun facts about people who were born at the same time!
You've probably seen the cute video of the twin baby boys speaking their own language to each other. This is a surprisingly common occurrence among twins. About 40 percent of them creating their own language, which is known as cryptophasia or twinspeak. This can actually lead to developmental delays in some instances, since both twins understand the made-up words and are less likely to learn the correct ones.