Here's a link to a blog about the genetic relatedness of tigers and domestic house cats from a recent publication. This is actually no big surprise, except to the blog author (PZ Myers) who's never had a cat. Anyone who's had a cat knows that your pet is just a small purring tiger. And some of them aren't so small; the F1 has a 26 pound beast who looks very impressive, but isn't all that fierce except if you get between him and his kibble. It's always funny to read about first-timer's impressions of cats. Every couple of weeks, all the cat toys get rounded up and placed in a small basket in the family room near their scatching post/climbing tree. Then the kitty girls begin rummaging around for favorites that begin to get distributed around the house again, often one to a room, just like a tiger.