Scientists say the Harlan's Ground Sloth could have weighed 1,500lb (680kg), and been up to 10ft in length. The sloth and bison species have been extinct for at least 10,000 years. La Brea Tar ...

Among the recent discoveries are a largely complete skull of a juvenile Columbian mammoth dubbed “Hayden” – found by crews at the La Brea Station – and fossils of camels and large horses. Two partial ...