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Showing posts with the label geology

Found: Genes for Fins, Paws, and Hands

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Scientists found the genetic code mice use for growing paws — in spotted gar, after they thought about what happened to fish 300,000,000 years back. An amateur fossil hunter found a complete ichthyosaur skeleton in Wales , professional fossil hunters found parts of a critter that isn't quite an ichthyosaur in China, and other paleontologists described a cat-size dinosaur that lived in what's now Montana. Still other scientists named a Cambrian — thing — after an esteemed colleague. Quite a few Cambrian critters are just like nothing that lives on today's Earth. More at A Catholic Citizen in America .

Earth's Wandering Poles, A Comet, a Wobbling Moon

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Robot explorers observed a comet as it whizzed past Mars, there's something very odd about a moon of Saturn, and Earth's magnetic field will probably flip much sooner than predicted. About Earth's magnetic poles switching places: I'm pretty sure we'll notice the event, but it won't be 'apocalyptic.'... ...Earth's magnetic field is weakening a whole lot faster than scientists expected. Our planet's north and south magnetic poles will switch places "soon:" on the geologic time scale. More at A Catholic Citizen in America .

New Maps for Earth and Moon, and India's Mars Mission

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Scientists at the Scripps Institution of Oceanography discovered thousands of previously-unknown submerged mountains in data from satellites designed for measuring ice caps and ocean currents. Other scientists found a long-buried rift system on Earth's moon, and India's space program put a spacecraft in Mars orbit — on their first try.... ...I'm pretty sure that most ' pure science ' has practical applications: given time. Sometimes, given a lot of time. It took about two millennia for the aeolipiles of Vitruvius and Hero of Alexandria to make the transition from laboratory curiosities to steam engines and spaceship motors.... More at A Catholic Citizen in America .

Scientific Discoveries: an Invitation to "Even Greater Admiration"

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This universe has been around for about 13,798,000,000 years, give or take 37,000,000. That's the current best estimate, from 2013 . It's big, too. The photo shows part of the Hercules Cluster of galaxies. Light from that bunch of galaxies traveled for about 500,000,000 years before reaching us. What we see is the Hercules Cluster as it was around the middle of the Cambrian here, roughly when the first trilobite showed up. Taking the universe 'as is' makes sense: for me, anyway. I would much rather learn more about this wonder-filled creation, than insist that the Almighty is limited to what folks knew a few centuries back. More at A Catholic Citizen in America .

African Wildlife: During the Cretaceous

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Scientists are are learning more about Africa's wildlife: as it was some 100,000,000 years ago.... ...Maybe you've seen that "are you satisfied? " cartoon chap, Mr. Squibbs, in another 'A Catholic Citizen in America' post. If so, feel free to skip straight to my take on dinosaurs in the news. If you're wondering what "tampering with things man was not supposed to know" and dinosaurs have to do with my faith — the short answer is that I'm Catholic, so using my brain is okay. Despite what some tightly-wound folks seem to believe, science and Christianity, faith and reason, get along fine. (Catechism of the Catholic Church, 159 ) I suspect part of problem some have with science is how big the universe is — and how years it's been since life began here on Earth.... More at A Catholic Citizen in America .

Volcanoes and Fossilized Brains: Studying Earth's Past

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We're learning that there's much more to learn about this universe. My response to our expanding horizons of knowledge is delight. Others react differently. A Christian worldview and shameless interest in God's creation may seem like an odd combination, so before sharing what I've read about volcanoes, the Grand Canyon, and fossilized brains, I'll discuss why I accept reality "as is."... ...Like the psalmist, the works of God make me jubilant. That's why I share what scientists are learning about the vast, ancient, and astounding universe.... More at A Catholic Citizen in America .

South American Dinosaurs, Large and 'Small;' and a Changing World

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Leinkupal laticauda isn't the smallest known dinosaur. That honor goes to Compsognathus , a turkey-sized fellow you wouldn't want to meet in a dark alley. Leinkupal may be the smallest sauropod, though: and probably among the last of that line.... ... Older than the Mountains (From Jon Sullivan, via Wikimedia Commons, used w/o permission.) (Mountains in the Teton Range, seen from Jackson Hole, Wyoming.) My parents and I visited Yellowstone and Grand Tetons National Parks when I was young, and spent a day in Jackson Hole , Wyoming. Years later, seeing photos we'd taken, I was surprised that my memories of the Teton Mountains were accurate: They really did look as big as I remembered them. It was summer when we were there, which may explain why one of the glaciers was noticeably lower on the mountain when we left. The mountains themselves hadn't changed, of course. If I went back there today, I doubt that they would be appreciably different. Over a human lifes

Moons, Solar Origins, and a Crash that Cracked the World (Maybe)

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Scientists seeking niches for life in the universe have a new tool, we've finding stars that shared our sun's origin, and have more clues about Earth's early years.... A Hypothetical Habitable Moon (From Lucianomendez, via Wikimedia Commons, used w/o permission. (" Artist's impression of a hypothetical habitable moon of Upsilon Andromedae d. ") That's a cool picture, but we don't know if Upsilon Andromedae d has moons: let alone one with an atmosphere, ocean, and clouds. Using a new exomoon detecting technique, we may soon know how closely the artist's impression matches reality.... ...A few years ago I ran into an intriguing bit of informed speculation: Earth may be about as small as a planet can be, and still support life: and that's another topic. Exoplanets: Hot Jupiters, Super-Earths, and More Scientists have cataloged 1786 planets orbiting other stars. These exoplanets are in 1106 planetary systems, including 460 multiple p