Full title: JURASSIC LARK Woolly Mammoths will roam new Jurassic Park-style theme park with cave lions and extinct horses in TEN YEARS, Russian scientists sayThe beasts are set to make a comeback to the plains of Siberia some 14,000 years after going extinct. LONG extinct cave lions may be about to rise from their icy graves and prowl once more alongside woolly mammoths and ancient horses in a real life Jurassic Park.