Looking for something awesome to do this weekend? Austin, Texas has so much to offer! Check this out: A new exhibit, "Extreme Mammals: The Biggest, Smallest and Most Amazing Mammals of All Time," opens at 9 a.m. at the Bullock Museum on Saturday, Nov. 23, with special family activities planned from 12 to 3 p.m. Visitors will be able to walk under a 15-ft. tall re-creation of the largest land mammal ever recorded, touch a real fossil mammoth tooth, and see what the Arctic looked like when it was warm and swampy. Family activities are free with admission.