Entomologist Dave Kavanaugh, rear, dressed as Santa Claus, poses for reporters as an unnamed female reindeer, foreground, and Miles, a male reindeer, are shown on the Living Roof at the California Academy of Sciences in San Francisco, Tuesday. The female will be named through a naming contest. The reindeer will be a part of the Academy's holiday program that will be exhibited until Jan. 16. The Living Roof Project is an ongoing citizen science program designed to give community members an opportunity to learn about the Academy’s unique roof ecosystem while contributing to important baseline data regarding the many plants, birds, and arthropods that inhabit and utilize the Living Roof’s 2.5 acres of green space. (AP Photo/Jeff Chiu)

Question: How old were you when you learned there was no Santa Claus?