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Cell Biology

Precambrian Cell Division Imaged
October 17, 2006
Embryos frozen in stone in the act of cell division were reported in Science.1  According to a press release from Virginia Tech, there are millions of fossilized embryos in the Doushantuo formation in south China, estimated to be 551 million years old, but “later stages of these animals are rare.”  The EurekAlert version of this […]
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Dinosaurs

Sea Monster Fossils Found in Arctic
October 6, 2006
The BBC News reported the discovery of over two dozen plesiosaurs, pliosaurs and ichthyosaurs (see 04/20/2005) north of Norway.  Skeletons of the large marine reptiles, completely assembled, were found buried in fine-grained sedimentary layers of black shale.  “Everything we’re finding is articulated,” said Jorn Harald Hurum, co-director of the dig.  “It’s not single bones here […]
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Dinosaurs

Record Dino Trove in Mongolia
September 15, 2006
67 dinosaurs in a week: that’s what diggers from Montana State University found in the Gobi Desert in Mongolia.  The team effort was led by veteran dinosaurologist Jack Horner.  Most skeletons were Psittacosaurs, thought to be predecessors of the horned ceratopsids, like Triceratops.  Seeking to understand the developmental biology of dinosaurs, the team was less […]
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Dinosaurs

Dinosaur Bone Hunting Looks Promising
September 4, 2006
With probably less than a third of dinosaur types known, prospects are good for a new generation of young people to find one of their own, reports News@Nature.  New finds in Mongolia, South America and China over the last fifteen years indicate the vast majority of dinosaurs are still waiting to be discovered.  The authors […]
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Dinosaurs

Meanwhile, Back on the Dinosaur Ranch
August 29, 2006
Sid Perkins went on a dinosaur hunt in Montana this past July, and wrote up his experiences for the cover story of the Aug. 26 issue of Science News.  It was more personal diary than science.  Perkins talked about the teamwork, hard work, and the occasional thrill of finding a fragment of bone that the […]
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Early Man

Team Claims “Hobbit Man” Is Fully Human
August 21, 2006
The bones of Homo floresiensis that caused such a stir two years ago (10/27/2004) are human ancestors of the current population of pygmies living on the island today, not a new species, according to a press release from Penn State.  The individual with the small skull (LB1) suffered from microcephaly and the rest of the […]
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Fossils

Cambrian Embryo Fossils Show Exquisite Detail in New X-Ray Imaging
August 10, 2006
The news media are all showcasing the detailed color-rendered X-ray tomographs of Cambrian worm embryos from China.  Scientists were able to determine that these embryos, alleged to be 500 million years old, are very similar to those of modern, living priapulid worms.  Despite their assumed age, some of the embryos were remarkably well preserved, displaying […]
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Dinosaurs

Opal Plesiosaurs, Flashy Pterosaurs and Hot Titanosaurs Inspire Stories
July 30, 2006
Paleontologists continue to dig up bones of fascinating species of long-lost animals.  When it comes to extinct species, the line between observation and interpretation becomes fuzzy, since there is no way to be absolutely sure how they behaved and what they were doing when they died.  This does not prevent scientists from freely speculating on […]
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Fossils

Is This Frog Marrow Really 10 Million Years Old?
July 25, 2006
LiveScience reported finding intact bone marrow from fossils of frogs and salamanders.  Without blinking an eye, reporter Ker Than croaked that the marrow is ten million years old.  He compared it with the intact soft tissue and blood cells found in a T. rex specimen last year (see 02/22/2006, 06/03/2005, 03/24/2005), and said, The discovery […]
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Fossils

Bear Tooth DNA Yields New Date Record: 400,000 Years
July 22, 2006
According to a story posted on Yahoo News, Swedish scientists found intact DNA in a bear tooth claimed to be 400,000 years old.  The team leader remarked, “It is usually hard to find DNA that is older than 100,000 years, and work on fossilized DNA mostly focuses on material that is a few tens of […]
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Fossils

Chinese “Living Fossil” Amphibians Found
July 22, 2006
World Net Daily found a story on People’s Daily Online that 1200 specimens of an amphibian, Hynobiidaes, have been found in southwest China.  The article states, “These are a type of amphibian species around 300 million years old that once used to live in the dinosaur period.” Other news sources have not yet reported this […]
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Fossils

Cambrian Mollusk: Does It Help Animal Evolution Story?
July 13, 2006
A soft-bodied mollusk named Odontogriphus known from the Burgess Shale, placed in the Middle Cambrian, has been described in more detail in Nature.1  If the Middle Cambrian is well after the Cambrian explosion, how can the authors claim this pushes the story of animal evolution far back into the Precambrian, before the explosion?  A reporter […]
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Fossils

Science Reporters Spin Spider Web Data Into Evolutionary Program
June 23, 2006
A spider was found perfectly preserved in amber (fossil tree sap), complete with its web and prey.  It is identical to modern spiders.  Isn’t evolution amazing?     If you just experienced a software crash, there must be something wrong with your BIOS.  All the news media ran that program just fine.  A patch is […]
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Fossils

Cambrian Explosion Precursors, or Drops in the Bucket?
June 18, 2006
Two recent presentations, one in person and one in print, tried to fill in the gap of fossils that led to the explosion of diversity in the Cambrian, known as the Cambrian Explosion (see 04/23/2006 entry). Darwin’s Dilemma Solved?  Dr. J. William Schopf (UCLA), renowned discoverer of Precambrian microfossils, triumphantly announced the solution to “Darwin’s […]
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Birds

How Can They Call This Duck a Missing Link?
June 16, 2006
The news media are abuzz with the phrase “Missing Link” again.  This time, it’s about a fossilized duck or loon found in Early Cretaceous strata in China, announced in Science.1  The article calls it a “nearly modern” bird with soft-tissue preservation, including webbed feet, wing feathers and downy feathers.  They said it “possesses advanced anatomical […]
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