Mussi and her colleagues re-examined the lower jawbone of an infant, which was discovered in 1981 at a site called Garba IV in the Ethiopian highlands. Garba IV is one of a cluster of sites known collectively as Melka Kunture. Mussi has nicknamed the jawbone “Little Garba”. “The teeth are a very good marker, so we can say for sure this is indeed an early Homo erectus,” says Mussi. If Homo erectus was able to adapt to this environment, it could also live in other cooler regions away from the equator, she says.