Final answer:
The oldest fossils of H. erectus/ergaster located outside of Africa date back to between 1.3 and 1.6 million years ago and were found on the island of Java, Indonesia.
Step-by-step explanation:
The age of the oldest fossils attributed to Homo erectus or Homo ergaster found outside of Africa is between 1.3 and 1.6 million years. These fossils were discovered on the island of Java, which is now part of Indonesia. They provide significant insights into the migratory patterns of early hominins as well as the evolutionary stages between Homo erectus and later species including modern humans.
Homo erectus is known for being a highly successful species in the genus Homo, with a long existence spanning nearly two million years. This species was also remarkably similar to modern humans in terms of stature and brain size, showing advanced traits that reflect evolutionary development.