Remains discovered on California's Channel Islands suggest humans may have arrived in North America 13,000 years ago, challenging long-held theories about early migration patterns.
The discovery of the "Arlington Springs Man" on Santa Rosa Island, dated to approximately 13,000 years ago, represents the earliest known remains of an adult found on the continent. This finding has prompted scientists to reconsider the timeline and methods of human migration into North America.
Traditionally, the prevailing theory posited that the first inhabitants crossed an ice-free corridor from Siberia into North America. However, the evidence from the Channel Islands indicates a potential coastal migration route. Researchers suggest that early humans may have utilized "kelp highways" along the Pacific shoreline, traveling by watercraft.
"This connects with the whole idea of a coastal migration, an ancient coastal migration where people would have been using watercraft and going around glaciers when they encountered them and working their way down until they came to California," said UC Santa Barbara anthropology professor John Johnson. Johnson believes these early inhabitants eventually evolved into the Chumash tribe, indigenous to California's central and southern coast.
The bones of the "Arlington Springs Man" were unearthed in 1959, buried 37 feet below sand, mud, and gravel. The Channel Islands, a remote chain located off the Southern California coast, have yielded other significant findings, including the remains of pygmy mammoths, a dwarf species endemic to the northern islands.
These mini mammoths, standing between 4.5 and 7 feet tall, are thought to have gone extinct around the same time humans arrived on the islands and as global climates began to shift. The exact cause of their extinction remains undetermined.
The islands were later encountered by Europeans in 1542 when Portuguese explorer Juan Rodríguez Cabrillo landed there. Cabrillo wintered on the islands after storms diverted his ships. He died on the islands in January 1543 from complications following an injury sustained during a skirmish with indigenous tribes.