Final answer:
H. erectus took approximately 1.3 to 1.6 million years to migrate from East Africa to Southeast Asia, settling in areas like Java.
Step-by-step explanation:
It took H. erectus between 1.3 and 1.6 million years ago to travel from East Africa to Southeast Asia. H. erectus is known to have settled on Java, now part of Indonesia, during this time. They are believed to have utilized land routes due to lower sea levels during the Pleistocene Ice Age, which made coastal passages more accessible. This migration demonstrates their capability for long-distance travel and adaptation to different environments.
It took H. erectus less than 1.8 million years to travel from East Africa to Southeast Asia. Fossils of H. erectus have been found in India, China, Java, and Europe. The migration likely occurred through land routes, as lower sea levels during the Pleistocene Ice Age allowed for more passage through coastal routes.