Fossil shows how whales evolved from walkers to swimmers The fossils of a possible whale ancestor that walked on land 50 million years ago is giving us new insights on how whales evolved into swimmers, according to findings published the April 2019 issue of Current Biology. The fossil was found in Peru, and researchers think it may have made its way from West Africa, indicating quadrupedal whales already could survive such a long journey at sea.
Cell-like chemically active droplets may contain clues about origins of life. Chemically active droplets that grow and divide like cells may have been key to the origins of life, according to a study published in the December 2016 issue of Nature Physics. Chemically active droplets can exhibit cycles of growth and division that resemble the proliferation of living cells. "It makes it more plausible that there could have been spontaneous emergence of life from nonliving soup," said study co-author Frank Julicher.
Discovery of five new species of tetrapod that lived between 360 million and 345 million years ago may help bridge the gap of 15 million years in the tetrapod fossil record and reveal more about how creatures moved from aquatic life to living on land. The new species plus seven other fragmentary fossils are described in a study published in the December 5th 2016 issue of Nature Ecology & Evolution.
Evidence that Evolution Trends Towards Increasing Body Size - A new study of the evolution of marine animals has found evidence that Cope's Rule, which hypothesizes that animal lineages evolve toward larger body size over time, is true. The researchers analyzed data that spaned over 500 million years and included more than 17,000 marine animal species. They found that body volumes had increased by over five orders of magnitude since the first animals evolved. Modeling also suggested that such a massive increase could not have emerged from neutral drift from a small initial value. Science 2015, 347, 867-870.
Fossilized 530 Myr Embryos Found in China - Fossilized embryos of a previously unknown creature have been found in southern China, dating back between 521 million and 541 million years, during the Cambrian period. It remains a mystery what these embryos would have grown up to become but some of the spheres had polygonal patterns that look similar to those seen on fossilized embryos from a Cambrian worm-like creature. "We found over 140 spherically shaped fossils, some of which include features that are reminiscent of division-stage embryos, essentially frozen in time," said University of Missouri researcher James Schiffbauer. See the full paper in the March 2014 issue of the Journal of Paleontology.
Multicellular
Life Present > 586 Million Years Ago
- No fossils or trace
fossils of multicellular bilaterian
life have been reported from early
in the Ediacaran era, though
molecular clocks and biomarker
studies indicate the possibility.
Pecoits and colleagues report in the
6/29/2012 issue of Science on
the discovery of the oldest
bilaterian burrows in shallow-water
glaciomarine sediments from the
Tacuarķ Formation, Uruguay. These
findings unite the paleontological
and molecular data pertaining to the
evolution of bilaterians.
Read more .....
Synthetic Genetic Evolution of polymers, broadly referred to as XNAs, can replicate and evolve just like their naturally occurring counterparts DNA and RNA. According to a study in the April 19th 2012 issue of the journal Science, the results of the research have implications not only for the fields of biotechnology and drug design, but also for research into the origins of life---on this planet and beyond. This means that you don't need to have the ribose and deoxyribose backbones of RNA and DNA in order to have transmittable, heritable, and evolvable information. Read more....
Microscopic, sponge-like African fossils could be the earliest known animals--and possibly our earliest evolutionary ancestors. The creature, Otavia antiqua, was found in 760-million-year-old rock in Namibia and was as tiny as it may be important. From these tiny "sponges" sprang very big things, the authors suggest in an article appearing in the South African Journal of Science . As possibly the first muticellular animals, Otavia could well be the forerunner of dinosaurs, humans-basically everything we think of as "animal." Read more......
The Top Ten Daily Consequences of
Having Evolved - From
hiccups to wisdom teeth to
goosebumps, the evolution of homo
sapiens has left behind some
glaring, yet innately human,
imperfections. By Rob Dunn,
Smithsonian.com, November 19,
2010
The "Cambrian Extinction" may not
have happened
according
to the report in the May 13th 2010
issue of the journal Nature.
A new fossil find in Morocco shows
that the disappearance of Burgess
Shale fossils is not due to an
extinction event, but more likely
reflects the absence of preservation
of similar soft-bodied organisms in
later periods. The discovery of
diverse soft-bodied creatures
provides a link between earlier
communities and the latter
"explosion of life".
Why
Ray Comfort is wrong - On
November 11th, 2009, Ray Comfort, an
evolution denier,
distributed copies of Darwin's first
book on college campuses, with an
introduction written by him making a
long list of bizarre claims about
Darwin and evolution. Help fight
this mis-information by printing out
this
one sheet rebuttal and
distributing it where needed.
A Does evolution go in reverse? Since the late 19th century, biologists have debated if evolution can go in reverse. If not, then evolution may depend on more than natural selection. Multiple evolutionary paths could be possible through small chance events. Previous studies have focused on complex traits such as whale flippers, and scientists often lack sufficient information about ancestral traits or how present-day traits evolved. Scientists now have evidence that evolution doesn't make U-turns, simply reversing selective pressure won't make a biomolecule revert to an earlier form.... see ScienceNOW Daily News 23 Sep 2009
A 47-million-year-old primate fossil
that is a missing link, promises to
shed new light
on
the earliest stages of evolution of
the lineage that eventually led to
humans. The unprecedented fossil of
a lemur-like creature that probably
weighed no more than 2 pounds when
it was fully grown is remarkable
because it is the most complete
primate specimen ever obtained. The
article describing the find can be
seen at
in the 19 May 2009 issue of
PLoS
15 Evolutionary Gems - provided by the journal Nature, this is a new resource summarizing fifteen lines of evidence for evolution by natural selection. As the editors explain, "About a year ago, an Editorial in [Nature] urged scientists and their institutions to 'spread the word' and highlight reasons why scientists can treat evolution by natural selection as ....an established fact". Check it out at: http://www.nature.com/nature/newspdf/evolutiongems.pdf
EXPELLED EXPOSED ! A
detailed look at the Ben Stein movie
Expelled: No Intelligence Allowed.
We'll show you why this movie is not
a documentary at all, but
anti-science propaganda aimed at
creating the appearance of
controversy where there is none.
Check it out at:
http://www.expelledexposed.com/
Fossil Crocodile is "Missing Link" - It has a mix of morphological traits common in prehistoric crocodiles and in the ones that exist today. The fossil of a land-bound reptile that could be a link between prehistoric and modern-day crocodiles. The 80-million-year-old predator, dubbed Montealtosuchus arrudacamposi, is 5.5-foot-long (1.6-meter-long) and was a long-limbed and extremely agile animal that roamed arid terrain in what is now the Brazilian countryside, As a missing link to prehistoric crocodiles, it offers us an excellent opportunity to study the evolutionary transition of these animals. For more see National Geographic News (Feb. 2008).
Evolution's Greatest Mistakes - As miraculous as living things might seem at first glance, a closer look reveals that evolution's blind blunderings often fall well short of perfection. Claire Ainsworth and Michael Le Page peek under the hood of life to assess the parts and processes where things seem to have gone spectacularly wrong. New Scientist 195.2616 (August 11, 2007): p36 (4).
Study Maps Evolution's Tiny Steps - For the first time, scientists have drawn a detailed map of the evolutionary steps taken by a protein that links modern humans to life that swam in the oceans 450 million years ago. The study, published in the journal Science, provides further rebuttal to creationists by filling in the gaps that show how evolution occurred on a molecular level. Read more at The News & Observer or in the 8/17/2007 issue of the Journal Science vol.317, no.5840, pp.884-85
Twin fossil find adds twist to human evolution - unearthed in Kenya, they show that two ancestral human species seem to have lived cheek-by-jowl in the same area, much as gorillas and chimpanzees do today. Both skull fragments, discovered by Fred Spoor of University College London and his colleagues, were found near Kenya's Lake Turkana, adding to the impressive list of early human fossils unearthed here. One of the fossils, an upper jawbone from the species Homo habilis, is dated at 1.44 million years, younger than most fossils of this species. Read more in the 8/8/2007 issue of the journal Nature.
A new website from the Federation of American Societies for Experimental Biology offers resources for to help defend Darwinism. Downloadable documents provide pointers on meeting with public officials, testifying at school board hearings, and related topics. Much of the advice is common sense, but some of it may be counterintuitive for scientists. (!/16/07)