Question about editing in 3ds max (simple?)

[Yoshiboshi3]

There has to be a way to do this.

If I make an edit to one side of the body, is there a way to "mirror" it to the other side? Like if I edit an ear, is there a way to make that happen on the other side?

If you need an example, I'm talking about the ears in this picture.

Pikachu's ears are proving to be a pain to edit, and I don't think it'll look good if I tried to do it twice mirrored.

[Tasty Pumpkin Clock]

ARGH I want to know this too....