The Internet Archive's Wayback Machine offers a refreshing step back in time. The archive is a digital library of Internet sites and other cultural artifacts in digital form. To date there are 477 billion web pages saved! I find it thrilling to look back in order to see how far we've come. I took the machine all the way back to 1997---gas was $1.22 a gallon in the US and £2.70 in the UK, Great Britain handed back Hong Kong to China, we said goodbye to Princess Diana, and wel