19th
The Internet. Go ahead and have fun! You’re anonymous!*

above is one artist’s (utopia) portrayal of the vast information superhighway known as the internet. if they took the training wheels off their internet modem/router, they would likely find the internet is much more than cute little kittens in compromising positions with ironic captions printed next to them. wait, now that i think about it, kittens do make up 50% of the world wide web. then you have 40% attributed to porn, 5% for actual educational and research subjects, 4% for social networking and blogging, and then the last 1% is comprised of a combination of e-mail, streaming media and…well, probably some more porn.

here is a visualization of the various routes through a portion of the internet. if you look really close, you can spot a youtube video of a panda bear sneezing.
thanks al gore!
but no, seriously, thanks tim berners-lee!