earliest fishhooks in the Americas were found here, dating to that time. These ancient fisher folk were catching deepwater fish species, indicating that they were using boats. These island peoples maintained trading connections with the mainland for thousands of years. The oldest dated human remains were found in the Los Angeles area. Partial remains of a skeleton referred to as Los Angeles Man were recovered from the ancient channel of the Los Angeles river in the Baldwin Hills area. The ‘Los Angeles Man’ appeared to be contemporaneous with the partially preserved remains of an Imperial mammoth. The remains were located some 370 meters apart; they revealed a similar fluorine content profile, and were recovered within the same geological unit. It was years later that the ‘Los Angeles Man’ remains were finally dated, but by then the mammoth remains were not available for comparative study, and only the cranium of ‘Los Angeles Man’ remained available for dating. The UCLA radiocarbon laboratory indicated the sample age to be more than 23,600 old (UCLA sample #1430), but the sample, obtained from cranial bone collagen, was too small to produce a confident date. Larger human settlements In the western half of Mesoamerica (that is, western portions of today's Mexico and northern Central America), some larger settlements appeared around 2000 BCE.<ref>See Matanchén Complex: New Radiocarbon Dates on Early Coastal Adaptation in West Mexico. Joseph B. Mountjoy, R. E. Taylor, and Lawrence H. Feldman. Science 17 March 1972: Vol. 175. no. 4027, pp. 1242–1243. Abstract: Samples of marine shell from archaeological context on the coast of Nayarit, Mexico, have given radiocarbon determinations of 1810 ± 80 B.C., 2000 ± 100 B.C., and 2100 ± 100 B.C. Even with maximum correction for upwelling these are the earliest dates for coastal occupation in West Mexico north of Acapulco, Guerrero. Analysis of the midden contents has provided new insights regarding early coastal adaptation.'</ref> A succession of cultures started with the very early Capacha culture, which appeared on the Pacific coast of modern Mexico about 1450 BC and spread into the interior. The following cultures developed into "high civilizations" in Mesoamerica, with extensive urban areas, writing, astronomy and fine arts: Olmec (beginning about 1150 BC) Mixtec (beginning perhaps 1000 BC) Maya (settled villages along the Pacific coast appear from 1800 BC, and ceremonial architecture by approximately 1000 BC) and Aztec (from the 14th century AD) Farther south, Panama was home