In boneyards across the continent, scientists have found the fossils of a giant snake, a huge flightless bird, and a seven-foot kangaroo.

在整个非洲大陆的尸骨堆放地里，科学家们发现了一条巨蟒、一只不会飞的大鸟和一只七英尺高的袋鼠的化石。