Imagine this: You are lounging on the porch when suddenly a visitor materializes on your lawn... from 1978! At first the time-traveler is unimpressed. No flying cars... no silver jumpsuits... it appears that nothing much has changed in 30 years. So what do you show them to impress them with just how much things HAVE changed? The first thing I would do is bring him inside and show him my computer. Email, IM, Google, GoogleEarth, the internet- all right here in my house - and everyone has one! If I could tear him away from that, I would take him for a ride. A quick stop to fill the gas tank and a trip to the grocery store will scare the crap out of him! But the cool debit card I used at both places will make up for it. A call comes in on my Star Trek like cell phone and the Time Traveler is impressed, so I show him my Ipod. What would YOU do to impress the time traveler? What would you show him that has changed in our world in the last 30 years?