"As much as I try to make every picture the same, I fail every day," Baden said. "There's always something that's a little different, aside from the aging process."
The photo project is now approaching 11,000 photos and has been featured in gallery exhibits.
While Baden has taken care to maintain his appearance over the years, he underwent chemotherapy in 2001 to treat prostate cancer, which altered his appearance temporarily.
Even while battling cancer, he managed to take his daily selfie. Baden admitted that over the 30-year span, there was one day where he forgot to take a photo: Oct. 15, 1991. He didn't have a good excuse, calling it a "dumb moment of forgetfulness."
The Associated Press contributed to this report.
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