The longest-running evolution experiment in human history has been going on since 1988, and yet it has already seen 80,000 generations. The "Long-Term Evolution Experiment" (LTTE) involves Escherichia coli (E. coli) and tracking genetic changes in 12 colonies of the same strain of non-pathogenic bacteria. Richard Lenski started the experiment at the University of California on February 24, 1988. It requires taking 1 per cent of the latest descendants of the ancestor strain and transferring them into a new dilute sugary solution, where they grow further. Lenski states on the website dedicated to the experiment that" bacteria easily grow 100-fold in a few hours." They continue to sit there until the next day, and again, 1 per cent of each population is transferred into fresh medium.&nbsp;"Bacteria reproduce by binary fission: one cell grows and, after it has doubled in size, divides to produce two daughter cells; the two daughter cells then replicate to make four cells; and so on," Lenski mentions on the website. This 100-fold growth translates to "about 6 and 2/3 doublings, or generations, each day." Once 500 generations are achieved, the E.coli that won't be used are frozen after being shielded by a cryoprotectant. The advantage of using E.coli is that it grows and mutates quickly, and the frozen strains can be thawed later for analysis.<h2>The LTTE experiment decodes evolution by natural selection</h2>Lenski says it is like "time travel in a scientifically meaningful way". &nbsp;He says this helps them directly compare the current LTEE bacteria with their ancestors. The evolved lines can be pitted against their ancestors to see how they have adapted and evolved by natural selection. The experiment is crucial as it throws light on certain processes that aren't observable in nature. Whether natural selection is slow or fast, does it dip at some point, how fit the organism gets and is there a limit to it, are some of the questions the LTTE experiment helps answer.&nbsp;"Six of the 12 LTEE populations evolved to be so-called 'hypermutators' by 50,000 generations," Lenski says. &nbsp; The 10,000th transfer of the experiment happened on March 13, 2017, and in August 2024, the LTEE populations passed 80,000 generations. The experiment is still on and will reveal a lot more about evolution in the near future.

The Long-Term Evolution Experiment (LTTE) tries to answer questions about evolution and how the process of natural selection works, whether it is slow or fast and does the curve changes at certain points. It has been going on for nearly 40 years, but it has seen thousands of generations.

The longest-running evolution experiment in human history has been going on since 1988, and yet it has already seen 80,000 generations. The "Long-Term Evolution Experiment" (LTTE) involves Escherichia coli (E. coli) and tracking genetic changes in 12 colonies of the same strain of non-pathogenic bacteria. Richard Lenski started the experiment at the University of California on February 24, 1988. It requires taking 1 per cent of the latest descendants of the ancestor strain and transferring them into a new dilute sugary solution, where they grow further. Lenski states on the website dedicated to the experiment that" bacteria easily grow 100-fold in a few hours." They continue to sit there until the next day, and again, 1 per cent of each population is transferred into fresh medium. "Bacteria reproduce by binary fission: one cell grows and, after it has doubled in size, divides to produce two daughter cells; the two daughter cells then replicate to make four cells; and so on," Lenski mentions on the website. This 100-fold growth translates to "about 6 and 2/3 doublings, or generations, each day." Once 500 generations are achieved, the E.coli that won't be used are frozen after being shielded by a cryoprotectant. The advantage of using E.coli is that it grows and mutates quickly, and the frozen strains can be thawed later for analysis. The LTTE experiment decodes evolution by natural selection Lenski says it is like "time travel in a scientifically meaningful way". He says this helps them directly compare the current LTEE bacteria with their ancestors. The evolved lines can be pitted against their ancestors to see how they have adapted and evolved by natural selection. The experiment is crucial as it throws light on certain processes that aren't observable in nature. Whether natural selection is slow or fast, does it dip at some point, how fit the organism gets and is there a limit to it, are some of the questions the LTTE experiment helps answer. "Six of the 12 LTEE populations evolved to be so-called 'hypermutators' by 50,000 generations," Lenski says. The 10,000th transfer of the experiment happened on March 13, 2017, and in August 2024, the LTEE populations passed 80,000 generations. The experiment is still on and will reveal a lot more about evolution in the near future.

The "Long-Term Evolution Experiment" (LTTE) tries to answer questions about evolution and how the process of natural selection works, whether it is slow or fast and does the curve changes at certain points. It has been going on for nearly 40 years, but it has seen thousands of generations.

World's longest evolution experiment started 37 years ago, but has already seen 80,000 generations

ISRO’s Shubhanshu Shukla will spend 14 days aboard the ISS during the Ax-4 mission, conducting over 60 experiments. The mission supports astronaut training and crew health studies and prepares india for future space programs and longer spaceflights.

ISRO’s Shubhanshu Shukla will spend 14 days aboard the ISS during the Ax-4 mission, conducting over 60 experiments. The mission supports astronaut training and crew health studies and prepares India for future space programs and longer spaceflights.

ISRO’s Shubhanshu Shukla: 14-day Ax-4 mission to conduct around 60 scientific experiments from 31 countries

Astronauts go through an episode of loss of bone density during extended microgravity missions. This is why there have been very few lunar landing missions in the history of space science. A quick loss of bone density is deemed life-threatening, and this has been a major factor that space agencies are supposed to address before humans can be sent to Mars.

Experiments on astronaut mice prove humanity has a chance to land on Mars

Elon Musk’s start-up medical device company, Neuralink, has come under the scanner of the US government over alleged animal-welfare violations, reports Reuters news agency, citing internal documents and sources close to the investigation.

More than 20 current and former staff have told Reuters that its animal testing is being rushed, causing needless suffering and deaths.

The probe by the US Department of Agriculture recently began its investigation after a request from the federal prosecutor, Reuters said quoting two sources with knowledge of the probe.&nbsp;

Neuralink is developing a brain implant that it claims will help paralysed people walk again and cure other neurological ailments.

It is being claimed that since 2018, roughly 1,500 animals, including more than 280 sheep, pigs and monkeys, have been killed due to experiments.

Reuters, which has quoted sources with direct knowledge of the company’s animal-testing operations, said that the figure was a rough estimate as the company does not keep a record of how many animals were tested and killed.

Moreover, the employees claimed that CEO Musk has been pressurising them to accelerate animal testing, resulting in botched experiments.

<h2>Elon Musk expects Neuralink’s chip to begin human trials in six months</h2>

<div class="videoWrapper trancodeVideo"><iframe allowfullscreen="" autoplay="1" class="includeVideo" frameborder="0" height="350" src="https://www.wionews.com/videos/elon-musk-expects-neuralinks-chip-to-begin-human-trials-in-six-months-539045/embed" style="width:100%;max-width:560px;" width="560"></iframe></div>

"We are simply not moving fast enough. It is driving me nuts," he reportedly wrote to staffers earlier this year.

Also read |&nbsp;<a href="https://www.wionews.com/world/facebook-parent-meta-threatens-to-remove-news-from-platform-if-us-passes-media-bill-540386">Meta threatens to remove news from platform if US passes media bill</a>

They say that the tests had to be repeated, increasing the number of animals being tested and killed, the employees told Reuters.

Animals are usually killed when experiments are completed, as it helps them to examine post-mortem for research purposes.

Also read |&nbsp;<a href="https://www.wionews.com/world/man-sues-company-for-forcing-him-to-do-nothing-at-work-yet-paying-him-almost-us250000-annually-540256">Man sues company for forcing him to do 'nothing' at work, yet paying him almost US$126K annually</a>

However, the current and former staff of Neuralink alleged that the number of animal deaths is higher than it needs to be.

This is not the first time that Neuralink has faced allegations of animal abuse.

Earlier this year, an animal-rights group accused the company's researchers of subjecting monkeys to "extreme suffering" while testing brain implants.

(With inputs from agencies)

WATCH WION LIVE HERE: 

<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="350" loading="”lazy”" src="https://www.wionews.com/live-tv/embed?autoplay=1&amp;mute=1" width="100%"></iframe>

Elon Musk’s start-up medical device company, Neuralink, has come under the scanner of the US government over alleged animal-welfare violations, reports Reuters news agency, citing internal documents and sources close to the investigation.

Elon Musk’s start-up medical device company, Neuralink, has come under the scanner of the US government over alleged animal-welfare violations, reports Reuters news agency, citing internal documents and sources close to the investigation. More than 20 current and former staff have told Reuters that its animal testing is being rushed, causing needless suffering and deaths. The probe by the US Department of Agriculture recently began its investigation after a request from the federal prosecutor, Reuters said quoting two sources with knowledge of the probe. Neuralink is developing a brain implant that it claims will help paralysed people walk again and cure other neurological ailments. It is being claimed that since 2018, roughly 1,500 animals, including more than 280 sheep, pigs and monkeys, have been killed due to experiments. Reuters, which has quoted sources with direct knowledge of the company’s animal-testing operations, said that the figure was a rough estimate as the company does not keep a record of how many animals were tested and killed. Moreover, the employees claimed that CEO Musk has been pressurising them to accelerate animal testing, resulting in botched experiments. Elon Musk expects Neuralink’s chip to begin human trials in six months "We are simply not moving fast enough. It is driving me nuts," he reportedly wrote to staffers earlier this year. Also read | Meta threatens to remove news from platform if US passes media bill They say that the tests had to be repeated, increasing the number of animals being tested and killed, the employees told Reuters. Animals are usually killed when experiments are completed, as it helps them to examine post-mortem for research purposes. Also read | Man sues company for forcing him to do 'nothing' at work, yet paying him almost US$126K annually However, the current and former staff of Neuralink alleged that the number of animal deaths is higher than it needs to be. This is not the first time that Neuralink has faced allegations of animal abuse. Earlier this year, an animal-rights group accused the company's researchers of subjecting monkeys to "extreme suffering" while testing brain implants. (With inputs from agencies) WATCH WION LIVE HERE:

Elon Musk’s brain chip firm Neuralink under lens over animal abuse claims

In space, fire behaves differently; changes in gravity and air flow can alter its spread and make extinguishing it more difficult.&nbsp;

Exactly how do engineers build fire-resistant homes on the Moon, where only 12 people have walked, or on Mars, where no one has even been? How do they research flammability in these unknown or little-known environments?

Here's how they plan to do it.

As part of Northrop Grumman's 17th cargo resupply mission to the International Space Station, NASA's Solid Fuel Ignition and Extinction project (SoFIE) will conduct experiments that will shed light on fire in space.&nbsp;

Also read |&nbsp;<a href="https://www.wionews.com/science/the-worst-is-yet-to-come-study-finds-that-omicron-is-10-times-better-than-delta-at-evading-covid-vaccines-454212" hreflang="en">'The worst is yet to come': Study finds that Omicron is 10 times better than Delta at evading Covid vaccines</a>

SoFIE will run in a chamber inside the station's Combustion Integrated Rack, which features a safe chamber for burning experiments.

“With NASA planning outposts on other planetary bodies like the Moon and Mars, we need to be able to live there with minimal risk,” said Paul Ferkul, SoFIE project scientist at NASA’s Glenn Research Center in Cleveland. “Understanding how flames spread and how materials burn in different environments is crucial for the safety of future astronauts.”

NASA will use the results of this experiment to select materials and designs for spacesuits, cabins, and habitats.&nbsp;

As NASA prepares to go farther and stay longer in space, the experiments will also enable it to identify the best ways to extinguish fires or smoldering materials while in space.&nbsp;

To demonstrate flame growth, decay, and extinction in space, a preliminary test called Burning and Suppression of Solids (BASS) burned a synthetic resin on the space station several years ago.

Also read |&nbsp;<a href="https://www.wionews.com/science/earth-to-mars-in-just-45-days-new-tech-promises-shorter-trip-to-red-planet-454135" hreflang="en">Earth to Mars in just 45 days: New tech promises shorter trip to red planet</a>

"On Earth, gravity has a profound influence on flames, but in the reduced gravity of space, fire can behave unexpectedly and could be more hazardous,” Ferkul said.

Scientists can study flames in the station's unique microgravity environment, where they are free from the effects of gravity. Data from the experiment, which cannot be collected on Earth, can then be used to develop mathematical models that predict how those materials would burn on the moon, Mars, or anywhere else.&nbsp;

“SoFIE builds on NASA’s prior flammability research,” said Lauren Brown, a project manager at Glenn. “Like other flame studies, this research will home in on how things ignite, burn, and are extinguished in space. It will provide a foundation for continuing human spaceflight beyond low-Earth orbit.”

The SoFIE project consists of five investigations that examine the flammability of plexiglass, cotton-based fabrics, and other materials commonly used in space flight.

Watch |&nbsp;SpaceX's Elon Musk shares simulation video 'Starship to Mars' depicting his plans for the red planet

<div class="videoWrapper trancodeVideo"><iframe allowfullscreen="" autoplay="1" class="includeVideo" frameborder="0" height="350" src="https://www.wionews.com/videos/spacexs-elon-musk-shares-simulation-video-starship-to-mars-depicting-his-plans-for-the-red-planet-454103/embed" style="width:100%;max-width:560px;" width="560"></iframe></div>

SoFIE is intended to study fire safety in spacecraft, but data from the experiments could also be used to improve fire safety on Earth. Data collected from the study will contribute to the body of knowledge that could be used to improve screening tests for materials that are fire safe for the home, office, aircraft, or other uses.

The experiments will be operational until November 2025, during which time NASA may accept proposals for additional experiments.

In space, fire behaves differently; changes in gravity and air flow can alter its spread and make extinguishing it more difficult. Exactly how do engineers build fire-resistant homes on the Moon, where only 12 people have walked, or on Mars, where no one has even been?

In space, fire behaves differently; changes in gravity and air flow can alter its spread and make extinguishing it more difficult. Exactly how do engineers build fire-resistant homes on the Moon, where only 12 people have walked, or on Mars, where no one has even been? How do they research flammability in these unknown or little-known environments? Here's how they plan to do it. As part of Northrop Grumman's 17th cargo resupply mission to the International Space Station, NASA's Solid Fuel Ignition and Extinction project (SoFIE) will conduct experiments that will shed light on fire in space. Also read | 'The worst is yet to come': Study finds that Omicron is 10 times better than Delta at evading Covid vaccines SoFIE will run in a chamber inside the station's Combustion Integrated Rack, which features a safe chamber for burning experiments. “With NASA planning outposts on other planetary bodies like the Moon and Mars, we need to be able to live there with minimal risk,” said Paul Ferkul, SoFIE project scientist at NASA’s Glenn Research Center in Cleveland. “Understanding how flames spread and how materials burn in different environments is crucial for the safety of future astronauts.” NASA will use the results of this experiment to select materials and designs for spacesuits, cabins, and habitats. As NASA prepares to go farther and stay longer in space, the experiments will also enable it to identify the best ways to extinguish fires or smoldering materials while in space. To demonstrate flame growth, decay, and extinction in space, a preliminary test called Burning and Suppression of Solids (BASS) burned a synthetic resin on the space station several years ago. Also read | Earth to Mars in just 45 days: New tech promises shorter trip to red planet "On Earth, gravity has a profound influence on flames, but in the reduced gravity of space, fire can behave unexpectedly and could be more hazardous,” Ferkul said. Scientists can study flames in the station's unique microgravity environment, where they are free from the effects of gravity. Data from the experiment, which cannot be collected on Earth, can then be used to develop mathematical models that predict how those materials would burn on the moon, Mars, or anywhere else. “SoFIE builds on NASA’s prior flammability research,” said Lauren Brown, a project manager at Glenn. “Like other flame studies, this research will home in on how things ignite, burn, and are extinguished in space. It will provide a foundation for continuing human spaceflight beyond low-Earth orbit.” The SoFIE project consists of five investigations that examine the flammability of plexiglass, cotton-based fabrics, and other materials commonly used in space flight. Watch | SpaceX's Elon Musk shares simulation video 'Starship to Mars' depicting his plans for the red planet SoFIE is intended to study fire safety in spacecraft, but data from the experiments could also be used to improve fire safety on Earth. Data collected from the study will contribute to the body of knowledge that could be used to improve screening tests for materials that are fire safe for the home, office, aircraft, or other uses. The experiments will be operational until November 2025, during which time NASA may accept proposals for additional experiments.

Fighting fire with fire: NASA to conduct experiments how things ignite, burn, & are extinguished in space

Voters in Switzerland have overwhelmingly rejected the ban on animal testing. Only about 20.9% of voters said yes to the ban in a referendum.

Medical experiments on Animals: Voters in Switzerland overwhelmingly reject ban on animal testing

Dr Anthony Fauci, who is US President Joe Biden's chief medical adviser, is facing a surge in demand from lawmakers to share information regarding the alleged use of an experimental drug on puppies.&nbsp;The demand has come from both the parties of the country. &nbsp;

On Friday, Democratic and Republican lawmakers sent a letter to Biden and the National Institute of Allergy and Infectious Diseases with a request to share details regarding the alleged infection of 44 beagle puppies with parasites in order to test an experimental drug on them, the Hill reported. &nbsp;

Also Read |&nbsp;<a href="https://www.wionews.com/world/bidens-popularity-drops-more-than-that-of-any-other-us-leader-since-end-of-wwii-poll-423840" hreflang="en">Biden’s popularity drops more than that of any other US prez since WWII: Poll</a>

"We write with grave concerns about reports of costly, cruel, and unnecessary tax-payer funded experiments on dogs commissioned by the National Institute of Allergy and Infectious Diseases," said the letter, which was signed by Republican South Carolina Rep Nancy Mace and 23 other lawmakers. &nbsp;

The letter goes on to state that according to invoices obtained through a Freedom of Information Act filing, cordectomies were performed on six- to eight-month-old dogs. &nbsp;

Also Read:&nbsp;<a href="https://www.wionews.com/world/now-russians-will-have-to-visit-warsaw-to-get-immigrant-visas-for-us-423730" hreflang="en">Now, Russians will have to visit Warsaw to get immigrant visas for US</a>

"As you are likely aware, a cordectomy, also known as 'devocalisation,' involves splitting a dog's vocal cords in order to prevent them from barking, howling, or crying," the letter points out, explaining that this type of procedure is opposed by organisations, such as the American Veterinary Medical Association and the American Animal Hospital Association. &nbsp;

(With inputs from agencies) &nbsp;&nbsp;

Dr Anthony Fauci, who is US President Joe Biden's chief medical adviser, is facing a surge in demand from lawmakers to share information regarding the alleged use of an experimental drug on puppies.

Dr Anthony Fauci, who is US President Joe Biden's chief medical adviser, is facing a surge in demand from lawmakers to share information regarding the alleged use of an experimental drug on puppies. The demand has come from both the parties of the country. On Friday, Democratic and Republican lawmakers sent a letter to Biden and the National Institute of Allergy and Infectious Diseases with a request to share details regarding the alleged infection of 44 beagle puppies with parasites in order to test an experimental drug on them, the Hill reported. Also Read | Biden’s popularity drops more than that of any other US prez since WWII: Poll "We write with grave concerns about reports of costly, cruel, and unnecessary tax-payer funded experiments on dogs commissioned by the National Institute of Allergy and Infectious Diseases," said the letter, which was signed by Republican South Carolina Rep Nancy Mace and 23 other lawmakers. The letter goes on to state that according to invoices obtained through a Freedom of Information Act filing, cordectomies were performed on six- to eight-month-old dogs. Also Read: Now, Russians will have to visit Warsaw to get immigrant visas for US "As you are likely aware, a cordectomy, also known as 'devocalisation,' involves splitting a dog's vocal cords in order to prevent them from barking, howling, or crying," the letter points out, explaining that this type of procedure is opposed by organisations, such as the American Veterinary Medical Association and the American Animal Hospital Association. (With inputs from agencies)

US lawmakers seek info from Fauci over alleged experiments on puppies

experiments

Experiments, News on Experiments, stories on Experiments, articles on Experiments, Experiments stories at Wion, Experiments news, Experiments latest news