Complex sentence: The Mojokerto child, also known as Mojokerto 1 and Perning 1, is the fossilized skullcap of a juvenile early human who has been identified as belonging to the species "Homo erectus".
Split into simpler sentences: The Mojokerto child, also known as Mojokerto 1 and Perning 1, is the fossilized skullcap of a juvenile early human. The skullcap is now identified as belonging to the species "Homo erectus".