Jenny McGrath/Business Insider
Scientists have been extracting huge fossils from the La Brea tar pits since 1913.Many of the animals lived during the Ice Age, as far back as 50,000 years ago.The tar pits have preserved an entire ecosystem, from mammoths to pollen.Tens of thousands of years ago, dire wolves hunted ground sloths and camels while herds of gigantic mammoths lumbered past...