Search Engines Design: a walk down memory lane from the 90s to today

Jacob Gube, Founder and Chief Editor of Six Revisionhas put together this awesome visual showing the evolution of search engines design from the 1990s to today. Some of them are not around anymore and it's nice to see them again, thanks to the wayback machine.
I used to love dogpile! Anyway, have a look... warning: nostalgia may get you!