Tag: science
Meet Pakicetus, the Terrestrial Mammal BioLogos Calls a “Whale”
In a previous post, we noted some fish-related problems with BioLogos’s page discussing the fossil record. But these aren’t the only marine mistakes on the page. BioLogos says regarding the evolution of whales: Recently, a 52-million-year-old whale fossil, Pakicetus, was found in Pakistan. It was clearly a small, wolf-sized whale, but it did not have the characteristic fat-pad, a structure that allows the whale’s jaw vibrations to be used for hearing. Also, its teeth were much like those of the terrestrial animals already thought to be related to whales. Aside from the fact that Pakicetus was discovered in 1983 (not exactly “recently”), there’s quite a bit more that should be said about this fossil. The claim that Pakicetus is a Read More ›
Something’s Fishy With BioLogos’s Description of Fish Fossil Record
In a prior post, I discussed how BioLogos’s website has a page titled “What does the fossil record show?” which is conspicuously missing any mention of the Cambrian explosion, or any other explosions in the history of life. The page also has other errors and omissions. In a section titled “Evidence of Gradual Change,” it states: “At 500 million years ago, ancient fish without jawbones surface.” Actually, the first known fossils of fish are from the lower Cambrian, meaning that their date is probably closer to 530 m.y.a., near the beginning of the Cambrian period. A Nature paper reporting this find was titled “Lower Cambrian vertebrates from south China.” It noted: “These finds imply that the first agnathans may have Read More ›
BioLogos’s Fossil Record Page Conspicuously Missing the Cambrian Explosion
The BioLogos website has a static page titled “What does the fossil record show?,” which would naturally lead one to expect that if you read the page, then you’ll learn what the fossil record shows. What’s odd about the page is that the page makes no mention whatsoever of the Cambrian explosion. This is despite the fact that Robert L. Carroll calls the Cambrian explosion “[t]he most conspicuous event in metazoan evolution”: The most conspicuous event in metazoan evolution was the dramatic origin of major new structures and body plans documented by the Cambrian explosion. Until 530 million years ago, multicellular animals consisted primarily of simple, soft-bodied forms, most of which have been identified from the fossil record as cnidarians Read More ›
Responding to John Wise’s Table Pounding at Southern Methodist University
There’s an old saying in the law that goes like this: When the facts are on your side, pound the facts. When the facts are not on your side, pound the table. If the responses to Discovery Institute’s recent conference at Southern Methodist University (SMU) are any indication, the facts are not on the side of anti-ID faculty at SMU. To be more precise, SMU biology lecturer John Wise wrote a letter to the SMU Daily, co-authored with SMU anthropology professor Ronald Wetherington, which made no less than 8 express or implied accusations of “dishonesty” against Discovery Institute.*** In 7 instances they claimed ID is pseudoscience or religion.*** Quite a feat for an under-700 word op-ed. His online response is Read More ›
Shape-Shifting Protein in Bacterial Flagellum Controls Spin Direction
It’s been long known that the bacterial flagellum can spin in one direction and then quickly reverse directions and spin in the other. A recent issue of Nature has an article titled, “Structure of the torque ring of the flagellar motor and the molecular basis for rotational switching” which elucidates some of the biomechanical properties of the FliG motor protein that allows this rotation switch to occur: The flagellar motor drives the rotation of flagellar filaments at hundreds of revolutions per second, efficiently propelling bacteria through viscous media. The motor uses the potential energy from an electrochemical gradient of cations across the cytoplasmic membrane to generate torque. A rapid switch from anticlockwise to clockwise rotation determines whether a bacterium runs Read More ›