Speaking of things that are huge, a Blue Whale's heart is so big, a small child can swim through the veins:

If you shrunk the Sun down to the size of a white blood cell and shrunk the Milky Way Galaxy down using the same scale, it would be the size of the continental United States:

There are more stars in space than there are grains of sand on every beach on Earth:

Here's what chalk looks like under a microscope:

DID YOU KNOW? 3.14 is PIE backwards:

Now get ready to have your childhood mind blown:

1. Let's start small: