BY Liza Sanchez

I recently organized my closet, determined to find some old photos taken at the Houston Zoo during my childhood.

The photos evoke fond memories for me. In one of them taken in the late 1970s, I am proudly posing in front of the lion water fountain. That fountain is still a welcoming fixture in the zoo.

Years later, I find myself back in a place of wonder and discovery. I now volunteer at the Houston Zoo as a veterinary...