Coral have growth rings, just like trees!
Scientists have found coral dating back 400 million years ago with 400 daily growth rings. That means, all those years ago, there were actually 400 days in a year, not 365.
Scientists have found coral dating back 400 million years ago with 400 daily growth rings. That means, all those years ago, there were actually 400 days in a year, not 365.
