This week it's the birthday of 127 million people from around the world, making our planet's shared birthdays pretty common. If we take one complete revolution around the sun to constitute a birthday, then our planet has had 4.5 billion birthdays.
This week it's the birthday of 127 million people from around the world, making our planet's shared birthdays pretty common. If we take one complete revolution around the sun to constitute a birthday, then our planet has had 4.5 billion birthdays.