How big is the universe? How small is the smallest thing? How does Ganymede compare in size to Texas, and to a sunflower seed? Cary Huang put this together over a year and a half, assisted by his twin brother Michael. They are 14 years old, and live in California. You should take a look at this. Everyone should. Clicking on the screen shot below will take you to the twin’s home page, where you can fiddle with the flash presentation and blow your mind, legally, with no drugs at all save that of the incredible natural world we come from.