Fossils – Page 79

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Fossil Brachiopod Shows Soft Part Details

August 18, 2005

American and British paleontologists described in Nature1 the discovery of nearly complete brachiopods with calcified soft parts intact. They exhibited intricate details never before seen in fossils of these organisms, sometimes called lamp shells. Brachiopods, a type of marine animal that attached itself to the sea floor with a pedicle or stalk, were very abundant […]

Fossils

Cambrian Fossil: What Is It?

August 17, 2005

A Cambrian fossil discovered in China may represent a new phylum, reports BBC News. Vetustodermis, discovered in 1979, looks like a flatworm with eye stalks and antenna. It resembles a mollusk or arthropod in some ways, but scientists aren’t sure how to classify it. Forcing it into any existing group requires “pushing and pulling” that […]

Birds

Lung Link to Dinos and Birds Disputed

July 21, 2005

Carl Wieland at AIG has given a creationist response to the widely-publicized claim last week that dinosaurs breathed like birds (see Live Science and News@Nature). Creationists are good for evolutionists. Otherwise, who would keep their rampant speculations in check? If evolutionists were really interested in truth, they would welcome debate over interpretations of evidence from […]

Fossils

Horse Evolution Tale Gets Hairier

June 30, 2005

If you thought the story of horse evolution was well understood as a poster child of Darwinism at work, consider what Weinstock et al. say in a preprint in PLoS Biology:1 The rich fossil record of horses has made them a classic example of evolutionary processes. However, while the overall picture of equid evolution is […]

Dinosaurs

Croc Teeth Bite Fatal Wound into Dino Phylogeny

June 23, 2005

This line sounds serious: “We have pretty much erased the record of Triassic ornithischian dinosaurs from North America, Europe and worldwide, except for South America.” This is what William Parker said about his find of a complete Revueltosaurus fossil in Arizona that upsets the leading story of the rise of the ornithischian dinosaurs (one of […]

Birds

Soft T-Rex Tissue Claimed Bird-Like; Age Ignored

June 3, 2005

More details about the soft tissue found in a T. rex thigh bone (see 03/24/2005 story) were published in Science this week.1 Mary Schweitzer’s team claims to have found evidence of medullary bone [MB], a type of mineralized and vascularized bony tissue found only in certain birds during ovulation as a buffer against calcium loss. […]

Botany

David Attenborough Finds Living Fossil Tree Romantic, Not Devastating

May 12, 2005

England’s famous Kew Royal Botanical Gardens is getting a Wollemi Pine, and David Attenborough, naturalist and evolution popularist, is proud of it. This “living fossil” was thought extinct for 200 million years, but was found alive and well a few years ago in Australia (see 12/15/2000 entry). Grinning like a kid at Christmas, […]

Dinosaurs

Toothy Dinosaur Goes Vegan

May 4, 2005

The news media all pounced on a dinosaur fossil discovery reported in Nature this week.1 Dinosaur finds are ever popular, and reporters especially like it when an artist’s rendition is available. Some outlets reporting the discovery of Falcarius utahensis, a previously unknown species “in the process of converting to vegetarianism from a rather more bloodthirsty […]

Fossils

Missing Link Fish Story

May 3, 2005

Once upon a time, 450 million years ago, scavenger fish without teeth or bones roamed the shallow icy waters of Africa which was undergoing an Ice Age. Slowly, over millions of years, they gained teeth and other structures characteristic of more advanced fish. Then, a few thousand years ago, a lake in the (now continental […]

Fossils

Giant Carnivorous Amphibians Found in African Fossil Deposit

April 23, 2005

Meat-eating amphibians shaped like crocodiles? Be glad you didn’t live in West Africa 250 million years ago, say scientists at McGill University. Two species were described, one with large and small fang-like teeth, and another with curved horns on the back of its head. The fossils didn’t come with dates on them, and since amphibian […]

Dinosaurs

Dinosaur Fossilized in the Act of Laying Eggs

April 15, 2005

Two eggs, with shell material still attached, were found inside the oviducts of a theropod dinosaur, a Chinese team reported in Science.1 This first-time discovery of intact eggs in the body of the female “suggests that theropod dinosaurs had two functional oviducts (like crocodiles) but that each oviduct produced only one egg at a time […]

Early Man

Gorilla or Hominid? Toumaï Controversy Continues

April 14, 2005

Michel Brunet’s controversial Toumaï skull (Sahelanthropus tchadensis) made the cover of Nature last week,1,2 but rivals contend it was not part of the human line. The skull he found in Chad in 2002 (see 07/11/2002 and 10/09/2002 entries) was badly disfigured and needed reconstructive surgery, leading to criticisms that any interpretations were subjective. […]

Fossils

More Convergent Evolution Claimed for Dino-Era Mammal

April 1, 2005

A chipmunk-size mammal with Popeye-like forearms and beaver-like teeth resembling an armadillo? That’s how the discoverers are describing the fossil they named Fruitafossor, a small mammal found near Fruita, Colorado and reported in Science.1 They think it dug burrows and ate termites. Of special interest were the open-root teeth like those of the beaver. Lead […]

Dinosaurs

Soft Tissue from Dinosaurs Found: Intact Cells and Blood Vessels

March 24, 2005

The news media are abuzz with exciting reports about the discovery of soft tissues recovered from a Tyrannosaurus rex bone; see CNN, National Geographic, BBC News, MSNBC and News@Nature for examples. The soft tissue, analyzed from a thighbone unearthed in Montana, was reported by a North Carolina team led by Mary Higby Schweizer and was […]

Fossils

Horse Evolution Is Back on the Charts

March 18, 2005

The old horse-evolution charts from the 1880s have been revised substantially since 1920 when paleontologists began to realize the story was not so simple. (Thomas Huxley had used the series of O. C. Marsh as a focal point of his 1876 lecture tour in the United States.) These charts portrayed small horses with three toes […]

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