roof day

we went to our friends house.  they live in an apartment on a roof.  i played with a cat using a laser pointer.  it was kind of like bullfighting - seeing how much time the cat could still stay on his feet and chase the light without catching it.

i wondered why cats like to chase lasers.  so we read this article.  then we played with the biomotion lab and learned about the wolfpack effect.  you should too.