History of Life

History of Life - 12/19/11 History of Life 1/8

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Unformatted text preview: 12/19/11 History of Life 1/8 www2.fiu.edu/alongoriA/gly1101/holo.html Week 14: Chapter 17 of your textbook THE HOLOCENE PRIMATES A PRIMATE EVOLUTIONARY TREE AND TIME SCALE : The prosimians ("before monkeys") The Anthropoids HUMAN ORIGINS Australopithec ines Comparing Apes to Hominids Early Hominids Differing Views of the Hominid Family Tree The Genus Homo The First Human: Homo habilis How Diverse Was Early Homo? Cro-Magnons Replac e the Neanderthals Our Own Spec ies: Homo sapiens The Humans Superfamily the Hominoidea Dental formula Humans differ from other animals in several ways Paleogeograph\: Last Gacial Ma[imum 18,000 \ears ago < http://ZZZ.scotese.com/lastice.htm > Modern World < http://ZZZ.scotese.com/modern.htm > Future Geograph\: +50 Ma < http://ZZZ.scotese.com/future.htm > +100 Ma < http://ZZZ.scotese.com/future1.htm > +250 Ma < http://ZZZ.scotese.com/future2.htm > 7HE HOLOCENE >The Holoc ene is the name given to the last 10,000 years of the Earth's history -- the time sinc e the end of the last major glac ial epoc h, or "ic e age." >To observe a Holoc ene environment, simply look around you! >Sinc e then, there have been small-sc ale c limate shifts -- notably the "Little Ic e Age" between about 1200 and 1700 A.D. -- but in general, the Holoc ene has been a relatively warm period in between ic e ages. >Another name for the Holoc ene that is sometimes used is the Anthropogene, the "Age of Man." This is somewhat misleading: humans of our own subspec ies, Homo sapiens sapiens, had evolved and dispersed all over the world well before the start of the Holoc ene. Yet the Holoc ene has witnessed all of humanity's rec orded history and the rise and fall of all its c ivilizations. Humanity has greatly influenc ed the Holoc ene environment; while all organisms influenc e their environments to some degree, few have ever c hanged the globe as muc h, or as fast, as our spec ies 12/19/11 History of Life 2/8 www2.fiu.edu/alongoriA/gly1101/holo.html is doing. >The vast majority of sc ientists agree that human ac tivity is responsible for "global warming," an observed inc rease in mean global temperatures that is still going on. >Habitat destruc tion, pollution, and other fac tors are c ausing an ongoing mass extinc tion of plant and animal spec ies; ac c ording to some projec tions, 20% of all plant and animal spec ies on Earth will be extinc t within the next 25 years. >The Holoc ene has also seen the great development of human knowledge and tec hnology, whic h c an be used -- and are being used -- to understand the c hanges that we see, to predic t their effec ts, and to stop or ameliorate the damage they may do to the Earth and to us. >Paleontologists are part of this effort to understand global c hange. Sinc e many fossils provide data on c limates and environments of the past, paleontologists are c ontributing to our understanding of how future environmental c hange will affec t the Earth's life....
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History of Life - 12/19/11 History of Life 1/8

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