News tagged with common ancestor
Before 'Lucy,' there was 'Ardi': Oldest hominid skeleton provides new evidence for human evolution (w/ Video)
In a special issue of Science, an international team of scientists has for the first time thoroughly described Ardipithecus ramidus, a hominid species that lived 4.4 million years ago in what is now Ethiop ...
Other Sciences / Archaeology & Fossils
Oct 01, 2009 |
4.6 / 5 (36) |
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Skulls show New World was settled twice: study
Two distinct groups from Asia settled in the New World and not one single migration as suggested by previous genetic studies, experts said Monday after comparing the skulls of early Americans.
Other Sciences / Archaeology & Fossils
Jun 14, 2010 |
4.7 / 5 (32) |
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Ancient teeth raise new questions about the origins of modern man
Eight small teeth found in a cave near Rosh Haain, central Israel, are raising big questions about the earliest existence of humans and where we may have originated, says Binghamton University anthropologist ...
Other Sciences / Archaeology & Fossils
Feb 09, 2011 |
4.6 / 5 (25) |
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New species of early hominid found
(PhysOrg.com) -- A previously unknown species of hominid that lived in what is now South Africa around two million years ago has been found in the form of a fossilized skeleton of a child and several bones ...
Other Sciences / Archaeology & Fossils
Apr 06, 2010 |
4.7 / 5 (23) |
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Chickens 'one-up' humans in ability to see color
(PhysOrg.com) -- Researchers at Washington University School of Medicine in St. Louis have peered deep into the eye of the chicken and found a masterpiece of biological design.
Feb 16, 2010 |
4.7 / 5 (22) |
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Study challenges bird-from-dinosaur theory of evolution - was it the other way around?
(PhysOrg.com) -- A new study just published in the Proceedings of the National Academy of Sciences provides yet more evidence that birds did not descend from ground-dwelling theropod dinosaurs, experts say, a ...
Other Sciences / Archaeology & Fossils
Feb 09, 2010 |
4 / 5 (19) |
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Neanderthals did not make jewelry after all
(PhysOrg.com) -- The theory that later Neanderthals might have been sufficiently advanced to fashion jewellery and tools similar to those of incoming modern humans has suffered a setback. A new radiocarbon ...
Other Sciences / Archaeology & Fossils
Oct 19, 2010 |
4.7 / 5 (13) |
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Last universal common ancestor more complex than previously thought
Scientists call it LUCA, the Last Universal Common Ancestor, but they don't know much about this great-grandparent of all living things. Many believe LUCA was little more than a crude assemblage of molecular parts, a chemical ...
Oct 05, 2011 |
4.9 / 5 (11) |
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'Animal embryo' fossils are actually microbes (Update)
Tiny fossils that scientists have thought for decades were the embryos of the earliest animals ever found have turned out to be the remains of much simpler microbial organisms.
Other Sciences / Archaeology & Fossils
Dec 22, 2011 |
4.6 / 5 (11) |
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A dead gene comes back to life in humans
(PhysOrg.com) -- Researchers have discovered that a long-defunct gene was resurrected during the course of human evolution. This is believed to be the first evidence of a doomed gene - infection-fighting human ...
Mar 06, 2009 |
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Did increased gene duplication set the stage for human evolution?
(PhysOrg.com) -- Roughly 10 million years ago, a major genetic change occurred in a common ancestor of gorillas, chimpanzees, and humans. Segments of DNA in its genome began to form duplicate copies at a greater ...
Biology /
Feb 11, 2009 |
4.6 / 5 (10) |
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Culture skews human evolution
(PhysOrg.com) -- The rise of agriculture 10,000 years ago meant the end of the hunter-gatherer lifestyle for which human beings had been optimized by millions of years of evolution and the beginning of an ...
Mar 12, 2009 |
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We are all mutants: Measurement of mutation rate in humans by direct sequencing
An international team of 16 scientists today reports the first direct measurement of the general rate of genetic mutation at individual DNA letters in humans. The team sequenced the same piece of DNA - 10,000,000 or so letters ...
Aug 27, 2009 |
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Early sunflower family fossil found in South America
(PhysOrg.com) -- A beautifully preserved fossil identified as being of an early relative of the Asteraceae, or aster, family nearly 50 million years old suggests the plant family, which has now colonized much ...
Other Sciences / Archaeology & Fossils
Sep 28, 2010 |
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New discovery places turtles next to lizards on family tree
(PhysOrg.com) -- Where do turtles belong on the evolutionary tree? For decades, the mystery has proven as tough to crack as the creatures' shells. With their body armor and retractable heads, turtles are such ...
Jul 20, 2011 |
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Common descent
A group of organisms is said to have common descent if they have a common ancestor. In modern biology, it is generally accepted that all living organisms on Earth are descended from a common ancestor or ancestral gene pool.
A theory of universal common descent via an evolutionary process was proposed by Charles Darwin in his book On the Origin of Species (1859), and later in The Descent of Man (1871). This theory is now generally accepted by biologists, and the last universal common ancestor (LUCA or LUA), that is, the most recent common ancestor of all currently living organisms, is believed to have appeared about 3.9 billion years ago. The theory of a common ancestor between all organisms is one of the principles of evolution, although for single cell organisms and viruses, single phylogeny is disputed (see: origin of life).
In his book The Ancestor's Tale, Richard Dawkins uses the word concestor as a substitute for "common ancestor." This new word is very gradually entering scientific parlance.
For more information about Common descent, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
