Archive for the ‘evolution’ category: Page 17

Sep 5, 2023

Scientists Discover ‘Pure Math’ Is Written Into Evolutionary Genetics

Posted by in categories: evolution, genetics, mathematics

Mathematicians delight in the beauty of math that so many of us don’t see. But nature is a wonderful realm in which to observe beauty born out of mathematical relationships.

The natural world provides seemingly endless patterns underpinned by numbers – if we can recognize them.

Luckily for us, a motley team of researchers has just uncovered another striking connection between math and nature; between one of the purest forms of mathematics, number theory, and the mechanisms governing the evolution of life on molecular scales, genetics.

Sep 3, 2023

Earth’s ancient breath: Study links atmospheric oxygen and mantle chemistry

Posted by in categories: chemistry, evolution

An international team of scientists has found a crucial link between the chemistry of Earth’s deep mantle and its early atmosphere. The study uncovers new insights into the evolution of life on our planet and the surge of atmospheric oxygen.

The scientists focused their investigation on magmas formed in ancient subduction zones, areas where portions of Earth’s crust sink back into the mantle.

The experts examined a critical juncture in Earth’s history known as the Great Oxidation Event (GOE), which occurred between 2.1 and 2.4 billion years ago.

Sep 2, 2023

Michael Levin: “Non-neural, developmental bioelectricity as a precursor for cognition”

Posted by in categories: biotech/medical, evolution, neuroscience

Plenary Talk by Michael Levin on “Non-neural, developmental bioelectricity as a precursor for cognition: Evolution, synthetic organisms, and biomedicine” at the Virtual Miniature Brain Machinery Retreat, September 16, 2021. Introduction by William Baker.

Michael Levin.
Director of the Allen Discovery Center.
Tufts University.

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Aug 31, 2023

The collective intelligence of cells during morphogenesis as a model for cognition beyond the brain

Posted by in categories: biotech/medical, chemistry, ethics, evolution, neuroscience

Michael Levin talk for the Mind, Technology, and Society (MTS) talk series at UC Merced on January 23, 2023. Abstract: Each of us makes the remarkable journey from the physics and chemistry of a quiescentunfertilized egg to that of a complex human being. How can we understand the continuousprocesses that scale up minds from the tiny physiological competencies of single cells to the large-scale metacognitive capacities of large brains? Here, I will describe a framework known as TAME-Technological Approach to Mind Everywhere — which enables identifying, understanding, andrelating to unconventional cognitive agents. I will use the example of the collective intelligence ofcells during morphogenesis to illustrate how we can begin to widen the lessons of multiscale neuroscience well beyond neurons. This will be essential as we head into a future that will bepopulated by a wide range of evolved, designed, and hybrid beings with novel bodies and novelminds. I will conclude with a case study of our new synthetic biorobot (Xenobots) and a discussionof the implications of these ideas for evolution, biomedicine, and ethics.

Aug 29, 2023

The potential of targeting mitochondria-associated programmed cell death for age-related disease treatment

Posted by in categories: biotech/medical, evolution, genetics, life extension

Scientists have recently reviewed the available literature to examine the critical roles played by mitochondria in maintaining homeostasis. The review summarized the involvement of mitochondria in age-related disease progression and highlighted its potential as a therapeutic target of these diseases. This review has been published in Experimental & Molecular Medicine.

Mitochondria is a cytoplasmic organelle in most eukaryotic cells and is enclosed by two phospholipid membranes: the inner mitochondrial membrane (IMM) and outer mitochondrial membrane (OMM). These membranes separate functionally compartmentalized structures, i.e., matrix and intermembrane space. Mitochondria contain a unique genetic code, mitochondrial DNA (mtDNA).

During evolution, most mitochondrial genes were lost or translocated to nuclei. However, genes that remained in mtDNA encode for essential translational apparatus, i.e., ribosomal RNAs and transfer RNAs. In addition, these genes also encode proteins that are key components of oxidative phosphorylation system (OXPHOS) complexes embedded in the IMM.

Aug 26, 2023

Can cells think? | Michael Levin

Posted by in categories: biotech/medical, evolution, neuroscience

We know that humans are an intelligent species. But this biologist breaks down the intelligence of each of our cells — and it will blow your mind.

❍ Subscribe to The Well on YouTube:
❍ Up next: An evolutionary history of the human brain, in 7 minutes

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Aug 25, 2023

What If We Became Cyborgs?

Posted by in categories: cyborgs, evolution, life extension

How would it feel to control objects with your mind? Or hear colors? Or maybe even live forever? Well, if you want to find out, all you have to do is become a cyborg. How would being part machine affect us? Would it cause a greater divide between the rich and the poor? And is this the next step in human evolution?

Transcript and sources:

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Aug 24, 2023

Evolution may explain values of the fundamental constants

Posted by in category: evolution

Proposal springs from an analysis of constraints imposed by life’s fluid motion.

Aug 23, 2023

Before the Big Bang 11: Did the Universe Create itself? The PTC model

Posted by in categories: cosmology, evolution, quantum physics, time travel

What happened before the Big Bang? In two of our previous films we examined cyclic cosmologies and time travel universe models. Specially, the Gott and Li Model and Penrose’s Conformal Cyclic Cosmology Recently Beth Gould and Niayesh Afshordi of the Perimeter Institute for Theoretical Physics have fused these two models together to create a startling new vision of the universe. In this film they explain their new proposal, known as Periodic Time Cosmology.

0:00 Introduction.
0:45 NIayesh’s story.
1:15 Beth’s story.
2:25 relativity.
3:26 Gott & Li model.
6:23 origins of the PTC model.
8:17 PTC periodic time cosmology.
10:55 Penrose cyclic model.
13:01 Sir Roger Penrose.
14:19 CCC and PTC
15:45 conformal rescaling and the CMB
17:28 assumptions.
18:41 why a time loop?
20:11 empirical test.
23:96 predcitions.
26:19 inflation vs PTC
30:22 gravitational waves.
31:40 cycles and the 2nd law.
32:54 paradoxes.
34:08 causality.
35:17 immortality in a cyclic universe.
38:02 eternal return.
39:21 quantum gravity.
39:57 conclusion.

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Aug 23, 2023

Earth Over The Next Billion Years

Posted by in categories: evolution, media & arts, space

Our lifespans might feel like a long time by human standards, but to the Earth it’s the blink of an eye. Even the entirety of human history represents a tiny slither of the vast chronology for our planet. We often think about geological time when looking back into the past, but today we look ahead. What might happen on our planet in the next billion years?

Written and presented by Prof David Kipping, edited by Jorge Casas.

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