If you put all the water on Earth in one place it would look like this:
Yes that is a lot of water, but compared with the rest of the planet it really is a tiny ball
via Boing Boing
UPDATE: Here is another image which also does the same thing with earth’s atmosphere. Again a surprisingly tiny ball.
UPDATE 2: Here is an image that shows what it would look like if you put all the *fresh* water on Earth in one place: