Final answer:
The most recent group of H. erectus fossils from Java come from the Sangiran area and are dated between 1.3 and 1.6 million years ago.
Step-by-step explanation:
The most recent group of H. erectus fossils from Java come from Sangiran. According to a study published in 'Science' by Matsu'ura et al. in 2020, the dating of these fossils suggests that the first appearance of Javanese Homo erectus in the area is between 1.3 and 1.6 million years ago. These discoveries contribute to the understanding of human evolution and migration patterns, with H. erectus believed to have settled on Java during lower sea levels provided by the Pleistocene Ice Age.