ANCHORAGE, Alaska (AP) — A federal agency wants its wooly mammoth tusk back.

The Bureau of Land Management in Alaska on Tuesday asked the public's help in recovering an approximately 10,000-year-old tusk stolen from the Campbell Creek Science Center, an interpretive center in east Anchorage.

The woolly mammoth is Alaska's official state fossil. The tusk was on display when the center was burglarized March 8. Anchorage police say a thief broke in through a window and took only the tusk, which weighs 100 pounds (45.4-kilogram).

The curved tusk is dark- and light-brown, mottled and about 5.5 feet...