Christen Brownlee's Articles
People arrived in Australia about 50,000 years ago. Soon after, many of the island's large mammals disappeared, new evidence suggests.
Among the animals that went extinct were several species of kangaroos and wombats and some other creatures found nowhere else. Known as marsupials, these animals had pouches but filled ecological niches populated elsewhere by lions, hyenas, hippos, tapirs, and other large animals.