I'm seeing big gaps in my memory now that I'm almost 60. For example, I had no recall of a vacation to London this past December; I believe I went because I was shown photos and I remember the trip I made right after to Belfast, but if I didn't have the reminder, I wouldn't have known that I went there.

I'm still working every day writing C++/CUDA/VHDL code, so I suppose I'm a healthy adult.