Knut the Polar Bear Dies

We fawned over him as a baby, rooted for him to find love, sympathized when he lost his caretaker, and celebrated birthdays with him. But our favorite polar bear, Knut, passed away on Saturday.

Most polar bears can live for up to 30 years in captivity, but Knut was only four when he died; zoo officials aren't yet sure what caused his death. We'll miss following his adventures, but for now, let's take a look back at some of our favorite Knut moments.