If you haven't noticed, it's 2013—the top of February, at that. See how fast the first month of the year just flew by? Get used to that feeling, and get ready to deal with it for the rest of your life, because, yes: You're getting old.

Every young adult feels hip and modern, but you have to think past the present. Cool, you have an iPad. But your niece that's due in two months won't even know about a world where tablets don't exist. All of those neat relics of your youth—CDs, Borders, Pepsi Blue—are a wrap. Over with. Dead.

At some point, you're going to have to come to terms with the reality that your age is getting a little up there in the digits, but not today. Now is the time for diving headfirst into memories. This list is not going to make the process of growing up any easier, but it does make for some very sweet nostalgia.

Revisit the past. These are 40 Rap Facts That Will Make You Feel Old.

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