It sounds like the set-up for a bad joke: what was five feet tall, ate fish, and was grey-and-red all over? According to a paper published today in Science, the

The bubble that separates our sun from the galaxy is surprisingly active. The second global map from the Interstellar Boundary Explorer (IBEX) shows that the edge of the solar system changes more quickly and drastically than scientists expected.

“If we’ve learned anything from IBEX so far, it’s that the models we were using for interaction of the solar wind with