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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.
It shows a sequence of figures, drawn by natural history painter and muralist Rudolph Zallinger (1919–1995). [4] The 15 human evolutionary forebears are lined up as if they were marching in a parade from left to right. The first two sentences of the caption read "What were the stages of man's long march from apelike ancestors to sapiens ...
The sequence divergence has generally the following pattern: Human-Chimp < Human-Gorilla << Human-Orangutan, highlighting the close kinship between humans and the African apes. Alu elements diverge quickly due to their high frequency of CpG dinucleotides which mutate roughly 10 times more often than the average nucleotide in the genome.
Molecular anthropology, also known as genetic anthropology, is the study of how molecular biology has contributed to the understanding of human evolution. [1] This field of anthropology examines evolutionary links between ancient and modern human populations, as well as between contemporary species.
Beginning of animal evolution. [54] [55] 720–630 Ma Possible global glaciation [56] [57] which increased the atmospheric oxygen and decreased carbon dioxide, and was either caused by land plant evolution [58] or resulted in it. [59] Opinion is divided on whether it increased or decreased biodiversity or the rate of evolution. [60] [61] [62 ...
Natural selection – Mechanism of evolution by differential survival and reproduction of individuals Sexual selection – Mode of natural selection involving the choosing of and competition for mates; Mutation – Alteration in the nucleotide sequence of a genome; Gene flow – Transfer of genetic variation from one population to another
Environmentalist Ellen Swallow Richards was the first woman admitted to the Massachusetts Institute of Technology, an impressive feat in and of itself.What's even more admirable was her work in science, a field in which women faced many obstacles, as well as the time she spent getting her Ph.D. in chemistry from MIT– well, almost.
It has been argued that human evolution has accelerated since the development of agriculture 10,000 years ago and civilization some 5,000 years ago, resulting, it is claimed, in substantial genetic differences between different current human populations, [211] and more recent research indicates that for some traits, the developments and ...