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Archive for the ‘evolution’ category: Page 15

Jun 12, 2024

Molecules in Motion: Advanced Spectroscopy Captures Molecular Dynamics in Real-Time

Posted by in categories: biological, chemistry, evolution, particle physics

Researchers have developed a new method that uses attosecond core-level spectroscopy to capture molecular dynamics in real time.

The mechanisms behind chemical reactions are complex, involving many dynamic processes that affect both the electrons and the nuclei of the involved atoms. Frequently, the strongly coupled electron and nuclear dynamics trigger radiation-less relaxation processes known as conical intersections. These dynamics underpin many significant biological and chemical functions but are notoriously difficult to detect experimentally.

The challenge in studying these dynamics stems from the difficulty of tracing the nuclear and electronic motion simultaneously. Their dynamics are intertwined and occur on ultrafast timescales, which has made capturing the molecular dynamical evolution in real time a major challenge for both physicists and chemists in recent years.

Jun 10, 2024

Every Single Cell in Your Body Could Be Conscious, Scientists Say. That Could Rewrite Everything We Know About Human Evolution

Posted by in categories: evolution, neuroscience

If trillions of tiny bits of consciousness are floating around inside you, it could change how we think about life.

Jun 10, 2024

Ned Block — What’s the Meaning of Consciousness?

Posted by in categories: evolution, neuroscience

Listen to audio versions of your favorite interviews with the Closer To Truth podcast: https://shorturl.at/hwGP3

Only about consciousness can we be 100 percent sure. That consciousness exists almost everyone agrees. What consciousness means—that’s where arguments and disputations arise. Must consciousness have ‘meaning’? Or can consciousness be a random accident, selected by evolution, the ‘foam on the waves’ of brain activity. But consciousness seems so radically vital.

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Jun 10, 2024

Implications for Rocky Planet Formation Around Low-Mass Stars

Posted by in categories: chemistry, evolution, space

“Many primary atmospheres of those planets will probably be dominated by hydrocarbon compounds and not so much by oxygen-rich gases such as water and carbon dioxide,” said Dr. Thomas Henning.


Can rocky planets form around stars smaller than our Sun, also called low-mass stars? This is what a recent study published in Science hopes to address as a team of international researchers investigated the chemical properties of an exoplanetary system orbiting the star, ISO-Chal 147, which is located approximately 600 light-years from Earth and whose star has a mass of 11 percent of our Sun with age estimates between 1 to 2 million years old. For context, our Sun is approximately 4.5 billion years old. This study holds the potential to help astronomers better understand the formation and evolution of young exoplanetary systems and their potential to host rocky planets.

For the study, the researchers used the Mid-Infrared Instrument (MIRI) on the NASA’s James Webb Space Telescope (JWST) to identify carbon-bearing molecules at temperatures of approximately 30 degrees Celsius (86 degrees Fahrenheit) within the protoplanetary disk forming around the young star. However, the team also found these molecules did not possess compounds containing oxygen, meaning the system might not have water or carbon dioxide, which are typically found in systems surrounding stars like our Sun.

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Jun 9, 2024

Twin Moons of Dinkinesh: NASA’s Lucy Unveils a Surprising Discovery

Posted by in categories: evolution, space

NASA’s Lucy spacecraft’s recent exploration of asteroid Dinkinesh not only highlighted the asteroid’s internal complexities but also led to a fascinating discovery: the formation of a double moon, Selam. This rare configuration, known as a contact binary, formed from debris orbiting Dinkinesh after a significant geological event. Credit: NASA/SwRI/Johns Hopkins APL/NOIRLab.

NASA ’s Lucy spacecraft’s November 2023 flyby of asteroid Dinkinesh revealed significant geological features indicating its internal strength and complex history. Images showed a trough, a ridge, and a contact binary satellite, Selam. These findings, suggesting that Dinkinesh responded dynamically to stress over millions of years, help scientists understand the formation and evolution of small bodies in the solar system.

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Jun 9, 2024

Johns Hopkins Scientists Discover Unusual New Hero in Evolution

Posted by in categories: chemistry, evolution, sustainability

One of Earth’s most consequential bursts of biodiversity—a 30-million-year period of explosive evolutionary changes spawning innumerable new species —may have the most modest of creatures to thank for the vital stage in life’s history: worms.

The digging and burrowing of prehistoric worms and other invertebrates along ocean bottoms sparked a chain of events that released oxygen into the ocean and atmosphere and helped kick-start what is known as the Great Ordovician Biodiversification Event, roughly 480 million years ago, according to new findings Johns Hopkins University researchers published in the journal Geochimica et Cosmochimica Acta.

“It’s really incredible to think how such small animals, ones that don’t even exist today, could alter the course of evolutionary history in such a profound way,” said senior author Maya Gomes, an assistant professor in the Department of Earth and Planetary Sciences. “With this work, we’ll be able to examine the chemistry of early oceans and reinterpret parts of the geological record.”

Jun 7, 2024

First Detection of Magnetism in Massive Stars Beyond Our Galaxy

Posted by in categories: cosmology, evolution

New findings reveal magnetic fields in three massive stars in the Magellanic Clouds, shedding light on the influence of magnetism on stellar evolution and the formation of neutron stars and black holes. The use of advanced spectropolarimetry techniques was crucial to overcome past observational challenges.

Magnetic fields have been discovered in three massive, hot stars within our neighboring galaxies, the Large and Small Magellanic Clouds, for the first time. Although magnetic fields in massive stars are not new to our own galaxy, their detection in the Magellanic Clouds is particularly significant due to the abundance of young, massive stars in these galaxies. This discovery offers a rare chance to investigate actively forming stars and explore the maximum mass a star can achieve while maintaining stability.

Impact of magnetism on star evolution.

Jun 7, 2024

Episode 1: “This Is Mind Uploading and Why Humanity Needs It”

Posted by in categories: evolution, neuroscience

Listen to this episode from Carboncopies Podcast on Spotify. As the first in the Carboncopies Podcast Series, Dr. Randal Koene addresses Mind Uploading generally and defines terms while outlining the goals of Carboncopies.org. In this episode the urgent need for Mind Uploading is presented as the critical next step in the evolution of humanity and consciousness.

Jun 7, 2024

Brian Greene — What Was There Before The Big Bang?

Posted by in categories: cosmology, evolution, information science, mathematics, quantum physics, singularity

The American theoretical physicist, Brian Greene explains various hypotheses about the causation of the big bang. Brian Greene is an excellent science communicator and he makes complex cosmological concepts more easy to understand.

The Big Bang explains the evolution of the universe from a starting density and temperature that is currently well beyond humanity’s capability to replicate. Thus the most extreme conditions and earliest times of the universe are speculative and any explanation for what caused the big bang should be taken with a grain of salt. Nevertheless that shouldn’t stop us to ask questions like what was there before the big bang.

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Jun 6, 2024

This bold new theory of ‘quantum weirdness’ could rewrite the story of evolution

Posted by in categories: biological, cosmology, evolution, quantum physics

“… living systems evolve to exploit any aspect of physics that enables exploration of all possible ‘fitness landscapes’.”

Indeed!


In 1990, within the intellectual haven of Haverford College, I embarked on a transformative academic journey into biophysics – the captivating intersection of physics and biology.

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