Tag Archives: million years

Bad astronomy | Impact of an ancient asteroid on the Wyoming/Nebraska border

It wasn’t a dinosaur killer, because it happened just before they appeared. But the idea is the same*. An asteroid about 4 kilometers wide – nearly half the diameter of the Chixulub impactor – slammed into Earth at 70,000 kilometers per hour. The fantastic kinetic energy of the asteroid’s motion …

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Can a planet have its own mind? : Information Center

February 16, 2022 In a self-proclaimed “thought experiment,” University of Rochester astrophysicist Adam Frank and his colleagues David Grinspoon of the Planetary Science Institute and Sara Walker of Arizona State University use scientific theory and broader questions about how whose life alters a planet, …

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Can a planet have its own mind? Thought experiment — ScienceDaily

The collective activity of life – all microbes, plants and animals – has changed planet Earth. Take, for example, plants: plants “invented” a way to undergo photosynthesis to enhance their own survival, but in doing so they released oxygen that changed the entire function of our planet. This is just …

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It used to be their world, now it’s yours – Red Bluff Daily News

Here’s something readers probably won’t find in another Red Bluff Daily News column: Andrew Knoll is best known for his contributions to Precambrian paleontology and biogeochemistry. He discovered microfossil records of early life around the world and was among the first to apply the principles of taphonomy and paleoecology to …

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New research links continents to key transitions in Earth’s oceans, atmosphere and climate

Mountain peaks, glaciers and prayer flags near the Kunzum La Pass, a high mountain pass connecting the Lahaul and Spiti valleys in the Indian Himalayas. Credit: Timothy Paulsen, UW Oshkosh A new study by University of Wisconsin Oshkosh geologist Timothy Paulsen and Michigan Tech geologist Chad Deering advances understanding of …

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A geoscience expert to study why continents split where magma is lacking

[ad_1] D. Sarah Stamps. Credit: Mike Lee The Earth’s surface keeps moving and changing shape, disintegrating and forming new land masses and oceans. In the billions of years of planet Earth’s history, there have been 10 supercontinents, the most famous and recent being Pangea which shattered around 175 million years …

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Study reveals more hostile conditions on Earth as life evolves

Graph showing how UV radiation on Earth has changed over the past 2.4 billion years. Credit: Please credit: Gregory Cooke / Royal Society Open Science For long parts of the past 2.4 billion years, Earth may have been more inhospitable to life than scientists previously thought, according to new computer …

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Iisc: the volcanoes of the last mass extinction created the Himalayas | Bangalore News

[ad_1] BENGALURU: Researchers at the Indian Institute of Science (IISc) have built models to determine whether volcanism – a magma eruption on the planet’s surface – that caused the last mass extinction 65 million years ago caused erosion of the Indian continental lithosphere. Following the movement of the Indian Plate, …

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Antarctic air bubbles indicate Earth’s oxygen thief

Share this Item You are free to share this article under the Attribution 4.0 International license. An unknown culprit has been removing oxygen from our atmosphere for at least 800,000 years. Analysis of air bubbles preserved in Antarctic ice for up to 1.5 million years reveals the likely suspect. “We …

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Caterpillar and butterfly – The Ukiah Daily Journal

A caterpillar is a eating machine, focused exclusively on consumption, much like a capitalist enterprise. But unlike a business, a caterpillar is a living organism, part of a larger process. At some point, it stops consuming, forms a protective chrysalis and completely dissolves, giving way to the emergence of a …

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USGS raises volcanic alert level

[ad_1] View of the Davidof volcano captured in 2005. Image: CA Neal / AVO / USGS Due to the possibility of volcanic unrest, the United States Geological Survey (USGS) and its Alaska Volcano Observatory (AVO) have increased the warning level and color code to YELLOW / ADVISORY at Davidof Volcano …

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End of the world: MIT scientist says we are on the verge of mass extinction | Sciences | New

[ad_1] At least five mass extinctions have occurred in the past, caused by cosmic and natural phenomena. Scientists estimate that up to 99.9% of all life, plant and animal, has been wiped out. The most recent extinction, the so-called Cretaceous-Tertiary Extinction, occurred around 66 million years ago when a killer …

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How LUCA, the first living being on Earth, appeared out of nowhere

[ad_1] December 4, 2021 Pedro necklace Update: 12/04/2021 01:25 a.m. Keep The study of the origin of life is a fascinating and complex field and has disturbed scientists not only out of intellectual curiosity, but also as a way forward to understand our own origins. One of the first to …

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What is geomicrobiology?

[ad_1] Geomicrobiology is the study of the role of microbes in the geological and geochemical processes that shaped the earth and continue to function today. Microbes play a vital role in the recycling, generation, sequestration and elimination of a wide variety of substances and chemicals in the environment Going through …

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Eggshell exoplanets: rocky worlds with ultra-thin brittle lithospheres could theoretically exist

[ad_1] The thickness of the fragile lithosphere – the outer part of a planetary body that fails by fracturing – plays a key role in the geological processes of that body. The properties of a planet and its host star can influence this thickness, and the potential range of these …

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Hot coal and photosynthesis – one answer – the Island

[ad_1] I wish GADS had stuck to its hesitation, without displaying its ignorance of basic chemistry and global gas cycles to defend its precious fossil fuels. Let me clarify: Carbon (C), the fourth most abundant element in the Universe, after hydrogen (H), helium (He) and oxygen (O), is the cornerstone …

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Top 10 largest forests in the world: full list here

Forests are said to be the lungs of planet Earth and cover nearly 31% of the land mass or its surface. Yet this is not enough. The United Nations has repeatedly reminded us that due to climate change and human interference, forests have fallen under the status of danger. However, …

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March? This is old news. Welcome to the decade of Venus

[ad_1] When it comes to exploring the solar system, the last few decades have undeniably been focused on visiting Mars. From sending rovers to its surface to making plans for possible crewed missions, the Red Planet holds an important place in our understanding of planetary science. But what about our …

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The slow carbon cycle, sink and waste | Clubs And Organizations

[ad_1] Dive into the slow carbon cycle! Fluxes include: respiration and photosynthesis (between the biosphere, hydrosphere and atmosphere), sedimentation and metamorphosis (between the biosphere and lithosphere), weathering, erosion, volcanism and combustion of fossil fuels (between the lithosphere and the atmosphere), dissolution and degassing (between the hydrosphere and the atmosphere), and …

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Us and our house | Cyprus Mail

[ad_1] Earth is the only planet we know where we can live By Roberto Sciffo The blue planet, planet Earth, is unique to our solar system and, given our current state of technological advancement, it is the only planet we know of where we can live. The “big picture effect” …

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Development or survival? Imbalance – Ground views

[ad_1] Photo courtesy of the BBC Sri Lanka’s country declaration to the 21st Conference of the Parties (known as COP21) to the 1992 United Nations Framework Convention on Climate Change, held in Paris in 2015, said: “We are aware of the big difference in carbon dioxide emitted by biological sources. …

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It turns out that Venus (almost) has tectonic plates

[ad_1] Beneath Venus’s acidic clouds and crushing atmospheric pressure lies a rocky surface strewn with geological mysteries. Sometimes referred to as Earth’s “sister planet” because it is similar in size with a similar iron core, molten mantle, and rocky crust, there is evidence that Venus was once a aquatic world …

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You drink dinosaur urine today

[ad_1] Your next sip of water probably went through a dinosaur. Thanks to the weather and the water cycle, you are probably drinking water that has passed through a dinosaur. Thanks to the water cycle that moves water in and through the air and soil, it’s very likely that your …

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Revenge of the Deep Sea Burrowers | Mirage News

[ad_1] The old seabed diggers have been bullshit for years. These prehistoric churners – a large assortment of worms, trilobites, and other animals that lived in Earth’s oceans hundreds of millions of years ago – are believed to have played a key role in creating the conditions for the flourishing …

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What is plate tectonics? | Tectonic plates

[ad_1] From the deepest ocean trench to the highest mountain, plate tectonics explains the characteristics and movement of the Earth’s surface in the present and the past. Developed from the 1950s to the 1970s, the theory of plate tectonics is the modern update of continental drift, an idea first proposed …

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Small volcanoes are a big deal on Mars

[ad_1] Life may be at the center of exploration of Mars today, but our planetary neighbor is home to the largest volcanoes in the solar system. Olympus Mons towers 23 kilometers (75,000 feet) above the surrounding landscape, and its neighbors, the Tharsis Montes (Arsia Mons, Pavonis Mons and Ascraeus Mons), …

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The African continent is slowly splitting in two

[ad_1] By David STEIN May 6, 2021 at 12:00 p.m. An impressive sinkhole has appeared in southwestern Kenya following heavy rains. Scientists see it as another sign of the gradual break-up of the African continent. The events giving rise to this news took place on the morning of March 19, …

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PASSHE OKs plan to merge six state colleges. What would change

[ad_1] JD Prose HARRISBURG, Pa .– The Pennsylvania State Higher Education System Board of Governors on Wednesday approved a preliminary plan to consolidate six universities, opening a 60-day public comment period on the unprecedented move. PASSHE’s plan would merge the University of California in Pennsylvania, the University of Edinboro and …

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Planet Earth – WorldAtlas

[ad_1] The Earth is a celestial object and one of the components of the solar system. It is the third planet from the Sun, and the only celestial object capable of supporting life. Earth is the 6th largest object in the solar system, with an average radius of 6,371 kilometers, …

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Meteorite impacts may have triggered an ancient subduction

[ad_1] Meteorite impacts may have triggered an ancient subduction by Sarah Derouin Thursday February 15th, 2018 The frequent impacts of large meteorites during the Hadean Aeon may have caused temporary episodes of subduction and active plate tectonics on Earth. Credit: Conceptual Imagery Lab at NASA’s Goddard Space Flight Center. The …

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What subduction teaches about smart design

[ad_1] Photo credit: USGS via Unsplash. My doctoral research focused on the tectonic history of early plates on Earth. Plate tectonics involves the movement of plates on the earth’s surface. It is believed to be driven by subduction, where one plate plunges into the mantle under another plate. Typically, this …

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There could be water on all the rocky planets

[ad_1] If you asked someone with reasonable scientific knowledge how the Earth got its water, they would probably tell you that it came from asteroids – or maybe also comets and planetesimals – that crashed into our planet in its infancy. There are details, nuances, and uncertainties surrounding this idea, …

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