Geology

Around 565 million years ago, just when life was getting seriously underway: The finding, reported online January 28 in Nature Geoscience, supports an idea previously proposed by simulations that Earth’s inner core is relatively young. It also provides insight into how, and how quickly, Earth has been losing heat since its formation 4.54 billion years ago —key to understanding not only the generation of the planet’s magnetic shield but also convection within the mantle and plate tectonics.Carolyn Gramling, “Earth’s core may have hardened just in time to save its magnetic field” at ScienceNews The powerful recent phase protects lifefrom damaging radiation. Paper. (open access) See also: Researchers: The Moon made life on Earth possible and What becomes of science when the Read More ›

From Brandon Spektor at LiveScience: Earth’s Inner Core Shouldn’t Technically Exist In the paper, the researchers argued that the standard model of how the Earth’s core formed is missing a crucial detail about how metals crystallize: a mandatory, massive drop in temperature that would be extremely difficult to achieve at core pressures. Weirder still, the researchers said, once you account for this missing detail, the science seems to suggest that Earth’s inner core shouldn’t exist at all. More. We don’t know as much as many people think about the Moon either. See also: Textbook theory of moon’s origin is challenged Space.com: Scientists finally know how old Moon is What’s surprising, really, is how little we know about the moon in Read More ›

Water is of central interest to ID and to many other fields of study relevant to the cosmos and in the world of life. Accordingly, the recent experimental discovery of a predicted metal-like state with a grid of O atoms and with H+ ions flowing through, is significant news.  As NY Times reports: >>This new form, called superionic water, consists of a rigid lattice of oxygen atoms through which positively charged hydrogen nuclei move. It is not known to exist naturally anywhere on Earth, but it may be bountiful farther out in the solar system, including in the mantles of Uranus and Neptune . . . . [S]cientists at Lawrence Livermore first squeezed water between two pieces of diamond with Read More ›

The critical problem is that rejection of competing ideas is not necessarily based on the correctness of the mainstream idea. Often, it is based on control of money, status, and power, rampant egos, and endless politics. This animated short tells the story of Alfred Wegener, a German astronomer and atmospheric scientist, who came up with the idea that continents once formed a single landmass and had drifted apart. Continental drift explained why continents’ shapes fit together like pieces of a puzzle and why distant continents had the same fossils . During Wegener’s time, the idea was met with hostility but after his death a large body of evidence showed that continents do indeed move. Today the theory of plate tectonics Read More ›

No, not Atlantis, which has contributed so much to world fantasy literature. There is, in fact, a sort of lost continent, Zealandia. From Tia Ghose at LiveScience: The lost continent, which is mostly submerged, with all of New Zealand and a few islands peeking out from the water, is about half the size of Australia. By drilling deep into its crust or upper layer, the new scientific expedition could provide clues about how the diving of one of Earth’s plates beneath another, a process called subduction, fueled the growth of a volcano chain and this lost continent in the Pacific Ocean 50 million years ago. The new expedition could also reveal how that Earth-altering event changed ocean currents and the Read More ›

From ScienceDaily: A University of Adelaide study into New Zealand’s acanthisittid wrens has provided compelling evidence that, contrary to some suggestions, New Zealand was not completely submerged under the ocean around 21 to 25 million years ago. “Most surprisingly, we found that some of the wren species were only distantly related to each other, potentially sharing a common ancestor over 25 million years ago,” Dr Mitchell says. “Previously, researchers have suggested that New Zealand was completely submerged 21 to 25 million years ago, which implies that all of New Zealand’s unique plants and animals must have immigrated and diversified more recently than that time. … “But the ancient divergences we found among the wrens suggest that they have been resident Read More ›

Having read the recent post here on where Earth’s water came from, I just stumbled across an interesting article over at ExtremeTech.com from June of this year, evidently commenting on a find that was originally reported in Science (at least, that’s what I’ve gathered from reading a bit about it elsewhere). I’m not sure if anything came of this or if it was mentioned here and I missed it (I couldn’t find it in a search), but I thought it might spark some interesting discussion. From the article, titled Scientists discover an ocean 400 miles beneath our feet that could fill our oceans three times over: After decades of theorizing and searching, scientists are reporting that they’ve finally found a massive reservoir of Read More ›

Even if Ken Ham may have fumbled on presentation, the facts may show him possibly closer to the truth on some matters. Rather than focus on the immense claims that are part of most YEC models (young universe, young stars, young planets, intelligent design of life, Noah’s flood, the tower of babel, created kinds, etc.), let me focus on the question of lab and field reporting in historical geology and paleontology, and something Nye said would change his mind. He said something to the effect: Why do we not have examples of fossils mixed between layers; for instance, a mammal in trilobite layers He suggested if we found such things he might change his mind. The first thing to realize Read More ›

If paleontology lives by radiometric dating, it also dies by radiometric dating. Either DNA trapped in 200 million-year-old Jurassic insect amber is young or it has some unexplained source. I argue it is young. Radiometric C-14 dates of fossils say the fossils are young. As I’ve said many times, the radiometric date of 65 million-year-old rocks is irrelevant to the radiometric date of the actual physical tissue of a fossil. I could bury a living dog in 65 million-year-old rocks, and the age of rocks will have nothing to say of the age of the dog. The best inferences for time of death of a fossil: half-life of C-14, half life of DNA, half-life of amino acids, etc., NOT the Read More ›

UD is honored to have Dr. Paul Giem as an occasional visitor. Here is Dr. Giem’s bio: Paul Giem, medical research Dr. Giem is assistant professor of emergency medicine at Loma Linda University. He holds a B.A. in chemistry from Union College, Nebraska, an M.A. in religion from Loma Linda University and an M.D. from Loma Linda University. Dr. Giem has published research articles in the areas of religion and medicine. His current research includes work on carbon-14 dating methods. He is author of the book Scientific Theology, which deals with a number of science–Bible areas, including dating methodology and biblical chronology. http://creation.com/paul-giem-medical-research-in-six-days One of the other UD commenters, franklin, is having a discussion with Dr. Giem in another thread. Read More ›