Created \t01\/27\/2006 2:15 am<\/p>\n
\talmost always seven vertebrae in the neck
\n\tPangaea<\/p>\n
\tThe processes which created the configuration of the continents
\n\tand the prevailing terrestrial landscape are exceptionally well
\n\tdemonstrated in Africa, where the particularities of ancient
\n\tgeology have endowed the continent wit immense deposits of mineral
\n\twealth — Some of the earliest-known forms of life have been found
\n\tin Africa, and its ancient rocks are the repository of evidence
\n\tfrom all stages in the evolution of life forms. Africa was the
\n\t‘keystone’ from which tectonic forces drove the other continents
\n\ton their global wanderings. Dinosaurs and the earliest known
\n\tmammals were present on the continent 200 million years ago. — A
\n\tlandscape of tropical rainforest and meandering rivers that
\n\texisted 40 million years ago in what is today the Sahara region of
\n\twestern Egypt was the cradle of the primates from whom the human
\n\tline evolved. Tropical rainforests preserve the greatest plant
\n\tdiversity on Earth, but they never have been permanent
\n\tfixtures–their extent and location varies with climatic change.
\n\t— Climatic change undoubtedly has a major effect on the
\n\tdistribution and population size of all living species, but
\n\tevidence from Africa indicates that competition for resources has
\n\thad more influence than climate on the origin and evolution of
\n\tspecies. — The upright bipedal gait of humans is a unique and
\n\thighly inefficient mode of locomotion, but the anatomy of modern
\n\tapes, with 60 per cent of their body weight carried on the
\n\thind legs, indicates that the common ancestor of apes and humans
\n\twas pre-adapted to bipedalism. Environmental circumstances in
\n\tAfrica provide an explanation of why and how the fully upright
\n\tstance and bipedal gait evolved in humans. — The ancestors of
\n\tmodern humans were bipedal nomads and scavengers who discovered
\n\tthat sharp stone flakes were more efficient than teeth at
\n\tdetaching meat from a carcass. Tools were teeth in the hand.<\/p>\n
\t— The demands of stone-tool manufacture were significant among
\n\tthe aspects of early hominid life which stimulated the development
\n\tof cognitive abilities and the evolution of anatomically modern
\n\thumans–homo sapiens sapiens–in Africa. — Thermoregulation and
\n\taccess to water were crucial determinants of human survival in the
\n\tAfrican cradle-land–and important preconditions for the evolution
\n\tof the species’ highly developed brain and social behavior. —
\n\tGenetic, palaeontological and linguistic evidence indicates that
\n\tanatomically modern humans existed only in Africa until about
\n\t100,000 years ago, when some migrated from the continent and
\n\tprogressively populated the entire globe. — …a greater
\n\ttime-depth of mutation was preserved among people in Africa, while
\n\teveryone else shared a predominance of mutations which had
\n\taccumulated in the relatively recent past. Setting these measures
\n\tof difference against the calculations of the rate at which
\n\tmutations occur, the geneticists concluded that the entire
\n\tpopulation of the modern world was descended from a relatively
\n\tsmall group of people that left Africa about 100,000 years ago.
\n\tExtrapolating still further they from the present into the past,
\n\tthey claimed that the distinctive form of modern humans had
\n\tevolved between 140,000 and 290,000 years ago in Africa… —
\n\tAfrican environments demonstrate the universal relationship that
\n\texists between soils, rainfall and vegetation in a natural
\n\tenvironment, and the extent to which biological adaptations enable
\n\tanimals to take advantage of what is available. —<\/p>\n
\tThough the fossil record of human evolution in Africa is unique
\n\tand extensive, it is also tantalizingly incomplete. Crucial stages
\n\tare still a matter of speculation. — Edit | Delete | Back to
\n\tNotepad<\/p>\n","protected":false},"excerpt":{"rendered":"
Created 01\/27\/2006 2:15 am almost always seven vertebrae in the neck Pangaea The processes which created the configuration of the continents and the prevailing terrestrial landscape are exceptionally well demonstrated in Africa, where the particularities of ancient geology have endowed the continent wit immense deposits of mineral wealth — Some of the earliest-known forms of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_s2mail":"","spay_email":""},"categories":[19],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/42"}],"collection":[{"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=42"}],"version-history":[{"count":0,"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/42\/revisions"}],"wp:attachment":[{"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=42"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=42"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bbrace.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=42"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}