May 12, 2015 7:25 am Mammoth Skull Gets Scan NBC 7’s Candice Nguyen shows us how the Naval hospital in Balboa Park is performing a fascinating round of tests on a very, very old patient. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season 2:20 Bodies of Missing Men Found in Rubber Bins Inside Storage Unit 1:42 Hundreds of Golden Retrievers Walk a Mile for the Official Boston Marathon Dog 1:51 Typewriter Shop Owner Receives Gift From Tom Hanks