Tag Archives: earth surface

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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Scientists use satellites to observe the Earth

Interior structure of the Earth. Getty By combining data on gravity, chemistry and how seismic waves are reflected and scattered deep within the Earth, an international group of scientists affiliated with the European Space Agency (ESA) have created a model of Earth’s lithosphere , showing how cold and hot rock …

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High definition subsurface imaging with cosmic ray muons

Voice of editors is a blog from the AGU Publications Department. Many structures, processes, and movements of geophysical materials are hidden in plain sight, so imaging them can be difficult for scientists. A new technique, muography, allows scientists to visualize the internal composition of solid geological structures at high resolution. …

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The attraction of the Sun and the Moon could move the tectonic plates

What causes lava to spurt from volcanoes in plumes of liquid fire or cause the ground to shake as if the world were ending? Tectonic plates. What causes plate tectonics? Not so fast. Until now, the answer was thought to be unrest in the Earth’s mantle. Under intense heat and …

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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

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 ago. …

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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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When two plates slide on top of each other

Through Robert Hazen, Ph.D., George Mason University Tectonic plates are large chunks of the lithosphere – about 50 or 100 kilometers thick, but thousands of kilometers in diameter – and lithospheric plates are displaced when they straddle the asthenosphere, which is mobile and moving. Transformation boundaries are a kind of …

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Land conservation is essential to protect the planet

Land conservation is extremely important for the well-being of the Earth and all species that inhabit it, including humanity. The entire biosphere, or all life on earth, depends on the connections and functions of the world’s ecosystems. As the health of ecosystems declines, the health of communities, states, nations, and …

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Anxiety as earthquakes persist in Abuja, Saki and others | The Guardian Nigeria News

• Researchers predict 40% probability of a 7.1 magnitude earthquake in Nigeria by 2028, seek to better understand active regional tectonics Episodes of earthquakes in and around Abuja, Niger, Kaduna, Kwara, Saki in Oyo and Ile Ife in Osun have left telltale signs of a reappearance. The Guardian reliably gathered …

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What is geomicrobiology?

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 biogeochemical …

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Unprecedented mineral found in diamond mined from the depths of the Earth’s mantle

In a major discovery, mineralogists identified an unprecedented mineral in a diamond unearthed from a mine in Botswana, Africa. Small black specks seen in diamond excavated from deep in the lithosphere, about 410 miles (660 km) below the earth’s surface, shed light on the planet’s unexplored secrets that remain hidden …

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A visual and scientific history of water from

image: Water cover seen Following Credit: MIT PRESS Water is so pervasive in our lives that it’s easy to take it for granted. The average American uses ninety gallons of water a day; almost all the liquids we come across are primarily water – milk, for example, contains 87 percent …

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

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 other …

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U scientists on the IPCC climate report 2021

Last week, the Intergovernmental Panel on Climate Change (IPCC) released its sixth report on the current state of the climate. One of the main findings states that “it is unequivocal that human influence has warmed the atmosphere, ocean and land. Widespread and rapid changes in the atmosphere, ocean, cryosphere and …

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Deep diamonds have a surprising organic composition

While most diamonds form under continents, at depths between 150 and 300 kilometers, a document published in Scientific reports has shown that two rarer types of diamonds – those found in oceanic rocks and those that form more than 300 kilometers below the continental crust – have a common and …

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Venus’s cracked surface behaves like sea ice

The Magellan spacecraft captured this radar view of Venus, showing the largest dark red tectonic block in the center, which is roughly the size of Alaska. The lighter colors around the block are warps and ridges. Image via NASA-JPL / Paul Byrne / NCSU. Cracked surface of Venus Venus is …

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Mooney Goes Wild Monday June 28, 2021

Derek Mooney and his guests explore the natural world in all its forms. Malar scratches Derek, Richard and Niall discuss why hawks and other animals seem to wear “eye makeup”. The distinctive markings known as the malar stripes are believed to enhance the hunting ability of predators such as hawks …

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Protect the oceans, says the UN to the nations

THE UNITED NATIONS: UN Secretary-General António Guterres called on Tuesday (Wednesday in Manila) for efforts to protect the oceans. The recently released Second Global Oceans Assessment confirmed that many of the benefits the global ocean provides to humanity are being undermined by human actions, he said in a post for …

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Magnitude 2.6 earthquake rocked parts of Southern California

According to the US Geological Survey, a magnitude 2.6 earthquake centered approximately east of Anaheim shook Orange County and other parts of southern California on Thursday May 27. Cali earthquake (Photo: Getty Images) At around 5:07 p.m., the earthquake struck. According to the USGS, the epicenter was about two and …

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What is plate tectonics? | Tectonic plates

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 by …

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Melting glaciers have shifted the Earth’s axis

Melting glaciers have shifted the Earth’s axis In the 1990s, the Earth’s axis underwent a major change. It is normal for the Earth’s axis to move a few centimeters each year. But, in the 1990s, the direction of the polar drift suddenly changed and the pace of the drift accelerated. …

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Planet Earth – WorldAtlas

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, and …

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How a German engineer pioneered aerial photography

German engineer Alfred Maul received his patent entitled “Rocket Camera for Taking Pictures” on April 19, 1904. Although Maul did not gain much from these ideas, he was surely at the forefront of photography. Aerial. Join ASGanesh as he tells you more about Maul and his attempts to click pictures …

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5.1 Quake Rattles Atlantic; No threat of tsunami

The strong earthquake was located near the equator in the Atlantic Ocean. Image: USGS A magnitude 5.1 earthquake struck a few moments ago under the central Atlantic Ocean; fortunately, there is no threat of a tsunami. The strong earthquake took place at an epicenter about 6 miles deep, located at …

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The four spheres of the earth

The earth can be divided into one of the four main subsystems, namely: earth, water, air and all living things. These categories are called spheres and are the lithosphere, hydrosphere, atmosphere and biosphere, respectively. The first three of these spheres are abiotic, meaning that they are not living things, while …

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Aging satellite reveals Earth’s inner structure

The European Space Agency’s GOCE mission ended more than seven years ago, but scientists are still discovering substantial discoveries from gravity data from the retired satellite – allowing us to dive deep into the interior of the Earth and learn what makes him tick. Scientists have combined GOCE data with …

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What subduction teaches about smart design

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 involves …

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Mark Torres wins the Clarke Prize from the Geochemical Society

PICTURE: Mark Torres with water samples taken from the Icelandic river Efri Haukadalsá in 2016. see After Credit: Photo by Woodward Fisher HOUSTON – (February 12, 2021) – Rice University’s Mark Torres has won the Geochemical Society’s highest honor for early career scientists, the FW Clarke Award, becoming the fourth …

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What is the hydrosphere and where is it?

Our Earth is truly a “Water World”. What is the hydrosphere? According to the definition as used in physical geography, the hydrosphere is the collective mass of water found on, above, and below the Earth’s surface. It includes both the world’s marine and freshwater resources and encompasses oceans, rivers, lakes, …

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