Ever since the recognition of the Neanderthals as an archaic form of human in the mid-nineteenth century, the fossilized bones of extinct humans have been used by paleoanthropologists to explore human origins. These bones tell the story of how the earliest humans first emerged in Africa some 6 to 7 million years ago. The bones also reveal that as humans became anatomically and behaviorally more modern, they swept out of Africa in waves into Asia, Europe, and finally into the New World. Even as paleoanthropologists continued to make important discoveries, experts in genetics were looking at the human species from a very different angle. In 1953 James Watson and Francis Crick first envisioned the double helix structure of DNA, the basic building block of all life. In the 1970s it was shown that humans share 98.7 percent of their genes with the great apes--that in fact genetically we are more closely related to chimpanzees than chimpanzees are to gorillas. And most recently the entire human genome has been mapped--we now know where each of the genes are located on the DNA strands that make up our chromosomes. In Human Origins: What Bones and Genomes Tell Us about Ourselves, two of the worlds foremost scientists, geneticist Rob DeSalle and paleoanthropologist Ian Tattersall, show how research into the human genome confirms what fossil bones have told us about human origins. This unprecedented integration of the fossil and genomic records provides the most complete understanding possible of humanity's place in nature, its emergence from the rest of the living world, and the evolutionary processes that have molded human populations to be what they are today.
具體描述
讀後感
評分
評分
評分
評分
用戶評價
相關圖書
本站所有內容均為互聯網搜索引擎提供的公開搜索信息，本站不存儲任何數據與內容，任何內容與數據均與本站無關，如有需要請聯繫相關搜索引擎包括但不限於百度，google,bing,sogou 等
© 2025 qciss.net All Rights Reserved. 小哈圖書下載中心 版权所有