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The nature of Earth’s deep past can often feel intangible. From our modern moment, eons billions of years in the past seem hard to touch. Among some of our planet’s rocks, however, are tatters and fragments from those distant times that can offer us a peek at what our planet was like when our ancestors were single-celled organisms. By studying some of these vestiges, geologists have been able to detect what was transpiring under the Earth’s crust over 2.5 billion years ago.

Below our feet—and our planet’s outer crust— Earth’s mantle makes up the vast majority of the planet’s volume. Different layers of the mantle are made up of different rock types, and one of the most common is an igneous rock high in silica content called peridotite. In the past, when geologists have compared samples of prehistoric peridotite from Earth’s mantle and their modern equivalents, they’ve found a significant discrepancy.

Large-scale earthquakes and tsunamis have historically affected the western regions of the U.S. and Canada and are likely to do so in the future.

Off the southern coasts of British Columbia, Washington, Oregon, and northern California, a 600-mile-long strip exists where the Pacific Ocean floor gradually subducts eastward beneath North America.

This area, called the Cascadia Subduction Zone, hosts a megathrust fault, a place where tectonic plates move against each other in a highly dangerous way. The plates can periodically lock up and build stress over wide areas―eventually to be released when they finally lurch against each other.

Curtin University researchers found that Western Australia’s Hamersley iron ore deposits are one billion years younger than previously believed, formed during significant geological events 1.4 to 1.1 billion years ago.

Research conducted by Curtin University has uncovered that the vast iron ore deposits in Western Australia’s Hamersley Province are approximately one billion years younger than previously estimated. This finding could significantly boost the search for more of the resource.

Using a new geochronology technique to accurately measure the age of iron oxide minerals, researchers found the Hamersley deposits formed between 1.4 and 1.1 billion years ago, rather than 2.2 billion years ago as previously estimated.

A research team has discovered the Fano resonance interference effect between mixed atomic spins. They proposed a novel magnetic noise suppression technique, reducing magnetic noise interference by at least two orders of magnitude. The study was published in Physical Review Letters. The team was led by Prof. Peng Xinhua and Associate Prof. Jiang Min from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS)

A fringe ideology on the far left has taken over academia, suppressing free speech and promoting grievance studies over evidence-based research, with the goal of controlling society and imposing its ideology on others.

Questions to inspire discussion.

What’s happening in American universities?
—A fringe ideology on the far left has taken over academia, suppressing free speech and promoting grievance studies over evidence-based research. This ideology aims to control society and impose its views on others. It’s spreading rapidly, metastasizing into other areas of society.