A living mammoth has reportedly been seen and videotaped in Siberia, offering irrefutable proof that the giant hairy prehistoric elephants — believed to have gone extinct thousands of years ago — still exist.

Guinness World Records says Giant George from Tucson is Tallest Living Dog & Tallest Dog Ever. Giant George weighing in at over 245 pounds and standing over 43 inches tall. Blue Great Dane from Arizona gives new meaning to the term “big dog.” Giant George stands 3 feet, 7 inches tall from paw to shoulder, which is three-quarters of an inch taller than his closest rival — Titan, a white Great Dane from San Diego.