Archive for the ‘biological’ category: Page 5

Jan 1, 2023

Microscopic Animal Brought Back To Life After 24,000 Years Frozen In Siberian Permafrost

Posted by in categories: biological, chemistry, life extension

Tardigrades have competition in the realm of microscopic and incredibly sturdy beasties. Like tardigrades, Bdelloid rotifers can also survive drying, freezing, starving, and even low-oxygen conditions. Now, scientists report that they revived some of these rotifers after having been frozen in Siberian permafrost for at least 24,000 years.

The incredible observations are reported in the journal Current Biology. The researchers took samples of permafrost about 3.5 meters (11.5 feet) deep and slowly warmed the sample, which led to the resurrection of several microscopic organisms including these tiny little animals.

“Our report is the hardest proof as of today that multicellular animals could withstand tens of thousands of years in cryptobiosis, the state of almost completely arrested metabolism,” co-author Stas Malavin of the Soil Cryology Laboratory at the Institute of Physicochemical and Biological Problems in Soil Science in Pushchino, Russia, said in a statement.

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Jan 1, 2023

Scientists Uncover a Gut-Brain Connection for Social Development

Posted by in categories: biological, neuroscience

To learn to socialize, zebrafish need to trust their gut.

Gut microbes encourage specialized cells to prune back extra connections in brain circuits that control social behavior, new University of Oregon research in zebrafish shows. The pruning is essential for the development of normal social behavior.

The researchers also found that these ‘social’ neurons are similar in zebrafish and mice. That suggests the findings might translate between species — and could possibly point the way to treatments for a range of neurodevelopmental conditions.

Dec 31, 2022

Why Do We Like What We Like? The Neuroscience Behind the Objects That Please Us

Posted by in categories: biological, neuroscience

Summary: Researchers say hedonic value isn’t simply a biological and psychological mechanism, it’s also vital for our survival.

Source: The Conversation.

We humans, like other cognitive systems, are sensitive to our environment. We use sensory information to guide our behavior. To be in the world.

Dec 31, 2022

Trillions of tiny, self-replicating satellites could unlock interstellar travel

Posted by in categories: biological, chemistry, genetics, satellites

Alpha Centauri, here we come.

However, while technology has indeed advanced a long way since the 1940s, it still seems like we are still a long way from having a fully functional von Neumann machine. That is unless you turn to biology. Even simple biological systems can perform absolutely mind-blowing feats of chemical synthesis. And there are few people in the world today who know that better than George Church. The geneticist from Harvard has been at the forefront of a revolution in the biological sciences over the last 30 years. Now, he’s published a new paper in Astrobiology musing about how biology could aid in creating a pico-scale system that could potentially explore other star systems at next to no cost.

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Dec 31, 2022

New research reveals how the brain holds information in mind

Posted by in categories: biological, computing, neuroscience

MIT neuroscientists have published a key new insight on how working memory functions, in a study published in PLOS Computational Biology.

The researchers at The Picower Institute for Learning and Memory compared measurements of brain cell activity in an animal performing a working memory task with the output of various computer models representing two theories on the underlying mechanism for holding information in mind.

The results favored the newer theory that a network of neurons stores information by making short-lived changes in the connections, or synapses, between them, rather than the traditional theory that memory is maintained by neurons remaining persistently active.

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Dec 31, 2022

Inside the $3bn mission to reverse signs of ageing

Posted by in categories: biological, life extension

At first, Professor Wolf Reik couldn’t quite believe the data. The experiment had involved an attempt to “rejuvenate” skin cells taken from a 53-year-old volunteer.

The results were better than anybody had expected: having been bathed in a cocktail of proteins, the cells now looked and behaved like those from somebody in their early twenties.

As different measurements of “biological age” confirmed the findings, the molecular biologist’s scepticism gave way to excitement. “I was falling off my chair three times over,” Reik said.

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Dec 31, 2022

Odd cave bacterium forms a multicellular ‘body,’ like plants and animals

Posted by in category: biological

This microbe has evolved specialized cells that make it unique among multicellular bacteria.

Dec 30, 2022

Decoding nature’s masterful engineering using math

Posted by in categories: bioengineering, biological, mathematics, media & arts

Logic gates in biology can be set up to lead to timing important biological events. How is this done?

Edit: at 4:00, not all pathways make use of this motif. This is just one way timing can happen in biology.

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Dec 28, 2022

Holly Moeller Finds Keys to Ecology in Cells That Steal

Posted by in categories: biological, food, habitats

Nature, red in tooth and claw, is rife with organisms that eat their neighbors to get ahead. But in the systems studied by the theoretical ecologist Holly Moeller, an assistant professor of ecology, evolution and marine biology at the University of California, Santa Barbara, the consumed become part of the consumer in surprising ways.

Moeller primarily studies protists, a broad category of unicellular microorganisms like amoebas and paramecia that don’t fit within the familiar macroscopic categories of animals, plants and fungi. What most fascinates her is the ability of some protists to co-opt parts of the cells they prey upon. Armed with these still-functioning pieces of their prey, the protists can expand into new habitats and survive where they couldn’t before.

Dec 26, 2022

HOW CELLS WORK — Dr. Bruce Lipton, PHd

Posted by in categories: biological, food

Dr. Bruce Lipton, PhD Explains how cells work, and how important cell voltage, vibration, and frequency is…

Speaker: Bruce Lipton PhD
Bruce is the author of “The Biology of Belief”

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