December 6, 2021
Mohenjo
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Electric vehicles have the potential to substantially reduce carbon emissions, but car companies are running out of materials to make batteries. One crucial component, nickel, is projected to cause supply shortages as early as the end of this year. Scientists recently discovered four new materials that could potentially help—and what may be even more intriguing is how they found these materials: the researchers relied on artificial intelligence to pick out useful chemicals from a list of more than 300 options. And they are not the only humans turning to A.I. for scientific inspiration.
Creating hypotheses has long been a purely human domain. Now, though, scientists are beginning to ask machine learning to produce original insights. They are designing neural networks (a type of machine-learning set up with a structure inspired by the human brain) that suggest new hypotheses based on patterns the networks find in data instead of relying on human assumptions. Many fields may soon turn to the muse of machine learning in an attempt to speed up the scientific process and reduce human biases.
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Machine learning techniques can help researchers develop novel hypotheses. Credit: Getty Images
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December 6, 2021
Mohenjo
Arts, Crime, Food For Thought, Human Interest, Medical, missed News, Political, Science, Technical
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December 5, 2021
Mohenjo
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After spending 1,909 Martian sols on the Red Planet, NASA’s Curiosity rover was suffering from a slight malfunction.
The robot’s drill stopped working while Curiosity was on Mars’ Vera Rubin ridge at the base of Mount Sharp. The rover had collected a sample of Martian dirt, and the team behind the mission decided to go a different route.
Instead of dropping the sample into one of the cups in the sample carousel, they dropped it into a cup pre-filled with a chemical mixture. The molecules released from the cup were then trapped and analyzed, revealing organic molecules on Mars that no space agency had previously detected.
The scientists detailed their discovery in a study published Monday in the journal Nature Astronomy.
Maëva Millan, a postdoctoral fellow at NASA’s Goddard Spaceflight Center and lead author of the new study, explains that the initial motivation behind the experiment was to have a reference for future chemistry experiments conducted on Mars samples.
“This experiment was definitely successful,” Millan tells Inverse. “While we haven’t found what we were looking for, biosignatures, we showed that this technique is really promising.”
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The Curiosity rover was recently joined by NASA’s Perseverance rover which landed on Mars on February 18.NASA
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December 5, 2021
Mohenjo
Business, Human Interest
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If there’s one rule that most people know about the Universe, it’s that there’s an ultimate speed limit that nothing can exceed: the speed of light in a vacuum. If you’re a massive particle, not only can’t you exceed that speed, but you’ll never reach it; you can only approach the speed of light. If you’re massless, you have no choice; you can only move at one speed through spacetime: the speed of light if you’re in a vacuum, or some slower speed if you’re in a medium. The faster your motion through space, the slower your motion through time, and vice versa. There’s no way around these facts, as they’re the fundamental principle on which relativity is based.
And yet, when we look out at distant objects in the Universe, they seem to defy our common-sense approach to logic. Through a series of precise observations, we’re confident that the Universe is precisely 13.8 billion years old. The most distant galaxy we’ve seen so far is presently 32 billion light-years away; the most distant light we see corresponds to a point presently 46.1 billion light-years away; and galaxies beyond about 18 billion light-years away can never be reached by us, even if we sent a signal at the speed of light today.
Still, none of this breaks the speed of light or the laws of relativity; it only breaks our intuitive notions of how things ought to behave. Here’s what everyone should know about the expanding Universe and the speed of light.
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A visual history of the expanding Universe includes the hot, dense state known as the Big Bang and the growth and formation of structure subsequently. The full suite of data, including the observations of the light elements and the cosmic microwave background, leaves only the Big Bang as a valid explanation for all we see. (Credit: NASA/CXC/M. Weiss)
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December 4, 2021
Mohenjo
Business, Enthralling, Human Interest, Photographs
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The Rice Terraces of the Philippine Cordilleras are a World Heritage Site consisting of a complex of rice terraces on the island of Luzon in the Philippines. They were inscribed on the UNESCO World Heritage List in 1995, the first-ever property to be included in the cultural landscape category of the World Heritage List. This inscription has five sites: the Batad Rice Terraces, Bangaan Rice Terraces (both in Banaue), Mayoyao Rice Terraces (in Mayoyao), Hungduan Rice Terraces (in Hungduan), and Nagacadan Rice Terraces (in Kiangan), all in Ifugao Province, Philippines. The Ifugao Rice Terraces reach a higher altitude and were built on steeper slopes than many other terraces. The Ifugao complex of stone or mud walls and the careful carving of the natural contours of hills and mountains to make terraced pond fields, coupled with the development of intricate irrigation systems, harvesting water from the forests of the mountain tops, and an elaborate farming system.
The Ifugao Rice Terraces illustrate the remarkable ability of human culture to adapt to new social and climate pressures as well as to implement and develop new ideas and technologies. Although listed by the UNESCO as a World Heritage site believed to be older than 2,000 years, recent studies from Ifugao Archaeological Project report that they were actually constructed upon Spanish contact about 400 years ago.
Maintenance of the living rice terraces reflects a primarily cooperative approach of the whole community which is based on detailed knowledge of the rich diversity of biological resources existing in the Ifugao agro-ecosystem, a finely tuned annual system respecting lunar cycles, zoning and planning, extensive soil conservation, and mastery of a complex pest control regime based on the processing of a variety of herbs, accompanied by religious rituals.
The rice terraces of the Cordilleras are one of the few monuments in the Philippines that show no evidence of having been influenced by colonial cultures. Owing to the difficult terrain, the Cordillera tribes are among the few peoples of the Philippines who have successfully resisted any foreign domination and have preserved their authentic tribal culture. The history of the terraces is intertwined with that of its people, their culture, and their traditional practices. Wikipedia
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An image from Bangaan Rice Terraces Philippines
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December 4, 2021
Mohenjo
Business, Food For Thought, Human Interest, Science, Technical
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Newton’s third law tells us that for every action, there’s an equal reaction going the opposite way. It’s been reassuring us for 400 years, explaining why we don’t fall through the floor (the floor pushes up on us too), and why paddling a boat makes it glide through water. When a system is in equilibrium, no energy goes in or out and such reciprocity is the rule. Mathematically, these systems are elegantly described with statistical mechanics, the branch of physics that explains how collections of objects behave. This allows researchers to fully model the conditions that give rise to phase transitions in matter, when one state of matter transforms into another, such as when water freezes.
But many systems exist and persist far from equilibrium. Perhaps the most glaring example is life itself. We’re kept out of equilibrium by our metabolism, which converts matter into energy. A human body that settles into equilibrium is a dead body.
In such systems, Newton’s third law becomes moot. Equal and opposite fall apart. “Imagine two particles,” said Vincenzo Vitelli, a condensed matter theorist at the University of Chicago, “where A interacts with B in a different way than how B interacts with A.” Such nonreciprocal relationships show up in systems like neuron networks and particles in fluids and even, on a larger scale, in social groups. Predators eat prey, for example, but prey doesn’t eat its predators.
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By programming a fleet of robots to behave nonreciprocally — blue cars react to red cars differently than red cars react to blue cars — a team of researchers elicited spontaneous phase transitions. Kristen Norman for Quanta Magazine
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December 4, 2021
Mohenjo
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Within a diamond hauled from deep beneath Earth’s surface, scientists have discovered the first example of a never-before-seen mineral.
Named davemaoite after prominent geophysicist Ho-kwang (Dave) Mao, the mineral is the first example of a high-pressure calcium silicate perovskite (CaSiO3) found on Earth. Another form of CaSiO3, known as wollastonite, is commonly found across the globe, but davemaoite has a crystalline structure that forms only under high pressure and high temperatures in Earth’s mantle, the mainly solid layer of Earth trapped between the outer core and the crust.
Davemaoite has long been expected to be an abundant and geochemically important mineral in Earth’s mantle. But scientists have never found any direct evidence of its existence because it breaks down into other minerals when it moves toward the surface and pressure decreases. However, analysis of a diamond from Botswana, which formed in the mantle around 410 miles (660 kilometers) below Earth’s surface, has revealed a sample of intact davemaoite trapped inside. As a result, the International Mineralogical Association has now confirmed davemaoite as a new mineral.
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Researchers discovered the mineral davemaoite inside a diamond that was formed in Earth’s mantle. (Image credit: Shutterstock)
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December 4, 2021
Mohenjo
Crime, Food For Thought, Human Interest, Medical, missed News, Political, Science, Technical
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December 3, 2021
Mohenjo
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Lansing is the capital of the U.S. state of Michigan. It is mostly in Ingham County, although portions of the city extend west into Eaton County and north into Clinton County. The 2020 Census placed the city’s population at 112,644, making it the sixth-largest city in Michigan. The population of its metropolitan statistical area (MSA) was 541,297 at the 2020 Census, the third-largest in the state after metropolitan Detroit and Grand Rapids. It was named the new state capital of Michigan in 1847, ten years after Michigan became a state.
The Lansing metropolitan area colloquially referred to as “Mid-Michigan”, is an important center for educational, cultural, governmental, commercial, and industrial functions. Neighboring East Lansing is home to Michigan State University, a public research university with an enrollment of more than 50,000. The area features two medical schools, one veterinary school, two nursing schools, and two law schools. It is the site of the Michigan State Capitol, the state Supreme Court, the Court of Appeals, a federal court, the Library of Michigan and Historical Center, and headquarters of four national insurance companies.
Lansing is the only U.S. state capital (among the 47 located in counties) that is not also a county seat. The seat of government of Ingham County is Mason, but the county maintains some offices in Lansing.
The first recorded person of European descent to travel through the area that is now Lansing was British fur trader Hugh Heward and his French-Canadian team on April 24, 1790, while canoeing the Grand River. The land that was to become Lansing was surveyed as “Township 4 North Range 2 West” in February 1827 in what was then dense forest. It was the last of the county’s townships to be surveyed, and the land was not offered for sale until October 1830. There would be no roads to this area for decades to come. Wikipedia
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An image from Lansing, MI, USA
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December 3, 2021
Mohenjo
Business, Food For Thought, Human Interest, Science, Technical
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The biggest mystery concerning the history of our universe is what happened before the big bang. Where did our universe come from? Nearly a century ago, Albert Einstein searched for steady-state alternatives to the big bang model because a beginning in time was not philosophically satisfying in his mind.
Now there are a variety of conjectures in the scientific literature for our cosmic origins, including the ideas that our universe emerged from a vacuum fluctuation, or that it is cyclic with repeated periods of contraction and expansion, or that it was selected by the anthropic principle out of the string theory landscape of the multiverse—where, as the MIT cosmologist Alan Guth says “everything that can happen will happen … an infinite number of times,” or that it emerged out of the collapse of matter in the interior of a black hole.
A less explored possibility is that our universe was created in the laboratory of an advanced technological civilization. Since our universe has a flat geometry with a zero net energy, an advanced civilization could have developed a technology that created a baby universe out of nothing through quantum tunneling.
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Credit: NASA, ESA, HEIC, and The Hubble Heritage Team (STScI/AURA)
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