Browsed by
Category: Geography/Geology

The chemistry of life is not exclusive to life

The chemistry of life is not exclusive to life

Siddhant Pusdekar writes: For 15 years, Sébastien Fontaine has been trying to kill dirt. The biochemist, who runs a lab at the French National Institute for Agriculture, Food, and Environment, wanted to know how much carbon is released by soil — just dirt alone, completely devoid of life. His team sealed dirt into jars and blasted them with sterilizing gamma radiation. Then they waited for the carbon dioxide released by the soil — a sign of ongoing microbial respiration —…

Read More Read More

What does the Anthropocene look like from below the Earth’s surface?

What does the Anthropocene look like from below the Earth’s surface?

James Dinneen writes: When Soviet engineers began to drain the Aral Sea in the 1960s, they could hardly foresee the scale on which their handiwork would alter the planet. The goal was to irrigate large areas of what is now Uzbekistan and Kazakhstan to grow cotton, part of a utopian project stretching back to czarist Russia to civilise the ‘backward’ regions of central Asia. Achieving this meant diverting most of the two rivers that fed the Aral Sea, which was…

Read More Read More

Ukrainian long-range drones are turning Russia’s size into a weakness

Ukrainian long-range drones are turning Russia’s size into a weakness

Peter Dickinson writes: For centuries, Russia’s colossal size has been widely regarded as the country’s greatest asset. From Charles XII of Sweden to Napoleon Bonaparte and Adolf Hitler, a long line of would-be conquerors have invaded Russia only for their armies to swallowed up by the vastness of the country. Ukraine is now attempting to turn this military logic on its head with a strategic bombing campaign that aims to exploit Russia’s immensity and transform it from a key strength…

Read More Read More

The oldest river in the world ran through Pangea

The oldest river in the world ran through Pangea

ZME Science reports: Rivers are poor archivists of their own past. They don’t sit still like fossils, or record a single birthdate like volcanic rock. Instead, they wander across floodplains, cut into rock and often move around or even abandon their channels. A river can spend millions of years destroying the very evidence that would prove how long it’s been there. That makes the question of the world’s oldest river surprisingly difficult. When geologists ask which river is the oldest…

Read More Read More

Deep-Earth map reveals fragment of a lost U.S. continent

Deep-Earth map reveals fragment of a lost U.S. continent

Science reports: Along the eastern front of the Appalachian Mountains, buried just below the surface, lies a fragment of a lost continent. Running from Maine to Georgia, the 200-kilometer-thick slab of crust was probably created by volcanic eruptions during the breakup of the Pangaea supercontinent some 200 million years ago and later buried by silt from eroding mountains. Known as the Piedmont Resistor, this piece of Pangaea is one of the signature discoveries of the Magnetotelluric (MT) Array, 1800 temporary…

Read More Read More

Has the Strait of Hormuz emerged as Iran’s most powerful form of deterrence?

Has the Strait of Hormuz emerged as Iran’s most powerful form of deterrence?

By Christian Emery, UCL One of the US and Israel’s justifications for launching the war on Iran was to ensure the regime in Tehran could never possess nuclear weapons, the ultimate deterrent against external attack. But the main lesson that has been taken from the war, according to some commentators, is that Iran’s own geography already provides it with all the deterrent it needs. The US-Israeli strikes have inflicted massive damage on Iran’s leadership and have destroyed billions of US…

Read More Read More

‘You cannot beat geography’: Iran already has a nuclear weapon. ‘It’s called the Strait of Hormuz.’

‘You cannot beat geography’: Iran already has a nuclear weapon. ‘It’s called the Strait of Hormuz.’

The New York Times reports: The United States and Israel launched their war against Iran on the argument that if Iran one day got a nuclear weapon, it would have the ultimate deterrent against future attacks. It turns out that Iran already has a deterrent: its own geography. Iran’s decision to flex its control over shipping through the Strait of Hormuz, the strategic choke point through which 20 percent of the world’s oil supply flows, has brought global economic pain…

Read More Read More

How geography powers Iran’s grip on the Strait of Hormuz, despite U.S. blockade

How geography powers Iran’s grip on the Strait of Hormuz, despite U.S. blockade

The Washington Post reports: Shipping traffic through the Strait of Hormuz remains constrained a week after the United States and Iran said they would facilitate vessel passage under a two-week ceasefire agreement. Instead, tensions have escalated. After Iran said ships must coordinate with its forces — and, in some cases, pay a toll — President Donald Trump called the demands “extortion” and announced Sunday that the United States would block ships entering or exiting Iranian ports, adding pressure to an…

Read More Read More

How the harsh icy world of Snowball Earth shaped life today

How the harsh icy world of Snowball Earth shaped life today

Graham Shields writes: As Scotland’s west coast recedes from view, the ocean resembles a mirror, broken only by the swash of the boat and the dolphins chasing us. We’re headed to the craggy, uninhabited islands known as the Garvellachs. Only reachable during Scotland’s short summer, there is nothing between here and North America, and so landing – or rather jumping hopefully onto slippery rocks – is dependent on the kindness of the Atlantic swell. We’ve come to see a globally…

Read More Read More

Paleolithic ingenuity: 13,000-year-old raised-relief map discovered in France

Paleolithic ingenuity: 13,000-year-old raised-relief map discovered in France

University of Adelaide: Researchers have discovered what may be the world’s oldest three-dimensional map, located within a quartzitic sandstone megaclast in the Paris Basin. The research is published in the Oxford Journal of Archaeology. The Ségognole 3 rock shelter, known since the 1980s for its artistic engravings of two horses in a Late Paleolithic style on either side of a female pubic figuration, has now been revealed to contain a miniature representation of the surrounding landscape. Dr. Anthony Milnes from…

Read More Read More

Nearly 20% of the cultural differences between societies boil down to ecological factors – new research

Nearly 20% of the cultural differences between societies boil down to ecological factors – new research

How much of a culture could be due to things like the grain it traditionally grew? Visoot Uthairam/Moment via Getty Images By Alexandra Wormley, Arizona State University and Michael Varnum, Arizona State University In some parts of the world, the rules are strict; in others they are far more lax. In some places, people are likely to plan for the future, while in others people are more likely to live in the moment. In some societies people prefer more personal…

Read More Read More

Has Earth’s inner core stopped its strange spin?

Has Earth’s inner core stopped its strange spin?

Nature reports: Thousands of kilometres beneath your feet, Earth’s interior might be doing something very weird. Many scientists think that the inner core spins faster than the rest of the planet — but sometime in the past decade, according to a study, it apparently stopped doing so. “We were quite surprised,” say Yi Yang and Xiaodong Song, seismologists at Peking University in Beijing who reported the findings today in Nature Geoscience. The results could help to shine light on the…

Read More Read More

How West Africa’s emerging megalopolis will shape the coming century

How West Africa’s emerging megalopolis will shape the coming century

Howard W French writes: It has long been said that no one knows with any certainty the population of Lagos, Nigeria. When I spent time there a decade ago, the United Nations conservatively put the number at 11.5 million, but other estimates ranged as high as 18 million. The one thing everyone agreed was that Lagos was growing very fast. The population was already 40 times bigger than it had been in 1960, when Nigeria gained independence. One local demographer…

Read More Read More

Are we really prisoners of geography?

Are we really prisoners of geography?

Daniel Immerwahr writes: Russia’s war in Ukraine has involved many surprises. The largest, however, is that it happened at all. Last year, Russia was at peace and enmeshed in a complex global economy. Would it really sever trade ties – and threaten nuclear war – just to expand its already vast territory? Despite the many warnings, including from Vladimir Putin himself, the invasion still came as a shock. But it wasn’t a shock to the journalist Tim Marshall. On the…

Read More Read More

Life helps make almost half of all minerals on Earth

Life helps make almost half of all minerals on Earth

Joanna Thompson writes: The impact of Earth’s geology on life is easy to see, with organisms adapting to environments as different as deserts, mountains, forests and oceans. The full impact of life on geology, however, can be easy to miss. A comprehensive new survey of our planet’s minerals now corrects that omission. Among its findings is evidence that about half of all mineral diversity is the direct or indirect result of living things and their byproducts. It’s a discovery that…

Read More Read More

The Great Unconformity has baffled geologists for a century

The Great Unconformity has baffled geologists for a century

Motherboard reports: Scientists can reconstruct incredible details about bygone eras in Earth’s history using fossils, rocks, and other clues preserved in its crust. But sometimes, the absence of geological records is just as telling as their presence. The Great Unconformity, a missing chunk of time that appears in rocks across the world, is the ultimate example of this phenomenon. This giant lapse in Earth’s memory exceeds one billion years in some places, resulting in 550 million-year-old rocks sitting atop ancient…

Read More Read More