47
edits
Changes
Jump to navigation
Jump to search
Line 28:
Line 28: + + − Consistent with their view that the fossil record as a whole does not support the evolutionary position<ref>[http://www.answersingenesis.org/home/area/faq/fossils.asp "Fossils Questions and Answers"], Answers In Genesis</ref><ref>[http://members.iinet.net.au/~sejones/fsslrcrd.html Creation/Evolution Quotes: Fossil Record]</ref>, creationists state that there is a lack of transitional fossils showing an evolutionary origin of kangaroos:+ Line 42:
Line 44: − Other views on kangaroo origins include the belief of some [[Australian Aborigines]] that kangaroos were sung into existence by their ancestors during the "[[Dreamtime]]" <ref>[http://www.painsley.org.uk/RE/signposts/y8/1-1creationandenvironment/c-abor.htm "An Aborigine Creation Story"]</ref> and the evolutionary view that kangaroos and the other marsupials evolved from a common marsupial ancestor which lived hundreds of millions of years ago.<ref>[http://www.accessexcellence.org/AE/AEPC/WWC/1995/australia.html "Australian Mammals: Evolutionary Development as a Result of Geographic Isolation"]</ref>
references added
==Origins==
==Origins==
Kangaroos (Macropodoidea) are divided into eight families. Five (Paleopotoroinae, Bulungamayinae, Balbarinae, Macropodinae, and Sthenurinae) are extinct, and three (Hypsiprymnodontinae, Potoroinae, and Macropodinae) are still surviving. DNA analysis of the three surviving groups has been done on three mitochondrial genes (12S rRNA, tRNA valine, 16S rRNA) and one nuclear gene(protamine P1). This analysis indicates that the most recent common ancestor of all the groups lived between 38 and 44 million years ago, and that the Hypsiprymnodon diverged from the remaining kangaroos between 34 and 38 million years ago. <ref>[http://www.springerlink.com/content/v2h426714759483j/ "Intergeneric Relationships Among Macropodoidea (Metatheria: Diprotodontia) and The Chronicle of Kangaroo Evolution"]</ref>
). A separate study based on microcomplement fixation of albumin <ref>[http://links.jstor.org/sici?sici=0039-7989(198903)38%3A1%3C38%3AAIROTM%3E2.0.CO%3B2-V "Albumin Immunologic Relationships of the Macropodidae (Marsupialia)"]</ref> supports this sequence for the split. This timing explains the kangaroo's isolation on Australia, as the accepted timing for Australia's separation from all other continents is 45 million years ago, 7 million years before the appearance of the first recognizable kangaroo. This 45 million year date is supported by geological evidence <ref>[http://www.earthmuseum.segs.uwa.edu.au/__data/page/48912/Li_and_Powell_2002.pdf, "An Outline of the Paleographic Evolution of the Australasian Region Since the Beginning of the Neoproterozoic"]</ref>, and by genetic analysis <ref>[The Complete Mitochondrial Genome of Rhea americana and Early Avian Divergences,Anna Härlid1, Axel Janke1, Ulfur Arnason1, Journal of Molecular Evolution, Volume 46, Number 6]</ref> of two birds, the South American Rhea and the Australian Cassowary, which were also separated by this event.
Other views on kangaroo origins include the belief of some [[Australian Aborigines]] that kangaroos were sung into existence by their ancestors during the "[[Dreamtime]]" <ref>[http://www.painsley.org.uk/RE/signposts/y8/1-1creationandenvironment/c-abor.htm "An Aborigine Creation Story"]</ref> and the creationist view that the fossil record as a whole does not support the evolutionary position<ref>[http://www.answersingenesis.org/home/area/faq/fossils.asp "Fossils Questions and Answers"], Answers In Genesis</ref><ref>[http://members.iinet.net.au/~sejones/fsslrcrd.html Creation/Evolution Quotes: Fossil Record]</ref>. Creationists state that there is a lack of transitional fossils showing an evolutionary origin of kangaroos:
<blockquote style="background: #F9F9F9; border: 1px solid #AAAAAA; padding: .3em;">
<blockquote style="background: #F9F9F9; border: 1px solid #AAAAAA; padding: .3em;">
The idea that God simply generated kangaroos into existence there is considered by most creation researchers to be contra-Biblical.
The idea that God simply generated kangaroos into existence there is considered by most creation researchers to be contra-Biblical.
== External Links ==
== External Links ==