Search results
Results from the WOW.Com Content Network
Fertilization is the fusing of the gametes; a sperm cell and an ovum (egg cell) fuse to form a single-cell zygote.This is the beginning of the diploid phase of the human life cycle after two genetically unique haploid cells created via meiosis and chromosomal translocation combine their DNA and begin to develop into a multi-cellular organism.
The five-minute hypothesis is a skeptical hypothesis put forth by the philosopher Bertrand Russell, that proposes that the universe sprang into existence five minutes ago from nothing, with human memory and all other signs of history included.
Antonie van Leeuwenhoek. Traditional religion attributed the origin of life to deities who created the natural world. Spontaneous generation, the first naturalistic theory of abiogenesis, goes back to Aristotle and ancient Greek philosophy, and continued to have support in Western scholarship until the 19th century. [15]
The finding that "Mitochondrial Eve" was relatively recent and African seemed to give the upper hand to the proponents of the Out of Africa hypothesis.But in 2002, Alan Templeton published a genetic analysis involving other loci in the genome as well, and this showed that some variants that are present in modern populations existed already in Asia hundreds of thousands of years ago. [31]
First, members of a generation share what the authors call an age location in history: they encounter key historical events and social trends while occupying the same phase of life. In this view, members of a generation are shaped in lasting ways by the eras they encounter as children and young adults and they share certain common beliefs and ...
First printing, July 2007 10 9 8 7 6 5 4 3 2 1 Library of Congress Cataloging-in-Publication Data Wolf, Naomi. The end of America : a letter of warning to a young patriot / Naomi Wolf. p. cm. Includes bibliographical references. ISBN 978-1-933392-79-0 1. Civil rights—United States. 2. Abuse of administrative power—United States. 3.
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
The first lineage to branch off from Mitochondrial Eve was L0. This haplogroup is found in high proportions among the San of Southern Africa and the Sandawe of East Africa. It is also found among the Mbuti people. [95] [96] These groups branched off early in human history and have remained relatively genetically isolated since then.