139 and doing just fine 🐢 Only Gramma has the right to lie about her age. For many tortoises, it's impossible to determine how old they are without knowing their hatch day. Since Gramma's exact birthday is unknown, wildlife care specialists had to estimate her age based on her size when she first arrived at the Zoo in 1928. Facebook - https://www.facebook.com/SanDiegoZoo/ Instagram - https://www.instagram.com/sandiegozoo/ Twitter - https://twitter.com/sandiegozoo Giphy - https://giphy.com/sandiegozoo TikTok - https://www.tiktok.com/@sandiegozoo Twitch - https://www.twitch.tv/sandiegozoo