Time makes fools of us all, but we just wish it didn't happen so soon! Do you ever catch yourself listening to your favorite song, then nearly have a heart attack when you remember what year it came out?
The fact is the world has changed a lot since we were young. These days toddlers know how to use the internet, but if you bring up Mr. Whipple nobody knows what you're talking about!
Take a look at this list of facts that will make you feel your age - if you're brave enough - and just keep reminding yourself that you're only as old as you feel.
1. Did you buy your kids the Harry Potter books?
The first one came out back in 1997, which means it's turning 20 years old later this year, so the boy wizard is almost old enough to vote. Other kids favorites from the same year include Pokemon and Teletubbies.
2. What were you listening to in 1980?
When the Irish rockers U2 released their first album Boy in 1980, they put 5-year-old Peter Rowen on the cover. 37 years later here's what he looks like today.
3. Speaking of getting older...
Kids born in the year 2000 could be graduating from high school this year.
4. But they won't be studying with an encyclopedia
The Encyclopedia Britannica used to be something every home in America was proud to own, but it actually stopped printing 5 years ago. Today, like pretty much everything else, it's online only.
5. Remember All In The Family?
If the show was rebooted today, the actor who played Archie Bunker's son-in-law Meathead (Rob Reiner) would be too old to play the family's dad. Caroll O'Connor was just 47 when the show started in 1971. Today, Reiner is 70 years old.
6. The show Magnum P.I. is 37 years old (and so is his car)
7. Remember when Brad Pitt and Jennifer Aniston were a couple?
That was more than 10 years ago. The couple split in 2005 after 5 years together, which is 2 years longer than his marriage with Angelina lasted.
Click the next page to learn how much TV has changed since you were young!