> Svante Paabo [said], "We will speak to the mouse." He did not promise that the mouse would say anything in reply. They do however whistle back. The "huma

> Svante Paabo [said], "We will speak to the mouse." He did not promise that the mouse would say anything in reply. They do however whistle back. The "humanized" baby mice do so at a lower pitch than normal mice. I find it interesting how precise genetic engineering has gotten.