It's the pictures that are older, not the tigers - they're fairly young. I took these back in March of 2009, several months before I started this blog. At that time there were three young Malayan Tiger cubs at the San Diego Zoo - two females Jin and Seri, and their brother Menderu (and I'm not so sure about the spelling).
One day two of them (probably Jin and Seri) found something to play with, and took it over to a log that used to be perched fairly high above a part of the big pond.
They played with it for a while, and then it slipped out of their grasp and fell into the pond below.
They jumped down to try to find it, and then the third cub joined in as well.