Who is attacking Jupiter?

Not only Levy-Shoemaker, but now another meteor attack on Jupiter, this System's
most obvious planet. Who is attacking? Do they think we live on Jupiter, and are sick of our TV?

Its obvious someone doesn't like us, but their aim isn't perfect.

Biology = computer science plus physics

Just occurred to me: biology is where computer science and information maths meets physics.
(As are various forms of electrical engineering.)

Hummingbird savior

Was just wondering where the cat was when all of a sudden there was a hummingbird fluttering around the kitchen. Followed by the cat. The bird hit a wall and fell down, and I found him lying on his back on the countertop. This saturday-morning cartoonish behavior did not bode well for the bird, I thought. I scooped him up and let him go outside and he buzzed off. The cat continued to be interested in the spot where I scooped him up. Then he went through the stages of grieving "you just lost your hummingbird" -- denial (where did the bird go?), anger (that human stole my bird!), bargaining (if you get my bird back, I won't let it go inside), depression (my bird is gone!), acceptance (well, I can still stalk more, and there is a dish of kibble in the garage), etc.

This is the third hummingbird I've saved from cats, one literally from my cat's jaws.