cross-posted from: https://lemmy.world/post/27377315

A new Swedish study reveals that many common office coffee machines fail to filter out cholesterol-elevating compounds found in coffee, sometimes leaving behind even more than espresso or French press. Depending on the machine and brewing method, the amount of harmful diterpenes like cafestol and kahweol can vary widely, and frequent coffee drinkers may be unknowingly boosting their LDL cholesterol levels.

Summary

US honeybee deaths hit a record high, with beekeepers losing over 60% of colonies this winter.

The crisis threatens pollination of key crops and has led to financial ruin for many beekeepers. Scientists cite climate change, habitat loss, pesticide use, varroa mites, and poor handling as potential causes.

The USDA is investigating the latest losses, but Trump-era staff cuts have slowed research, prompting Cornell University to assist.

Despite increased colony numbers from rising beekeeper interest, loss rates continue to surge, endangering agriculture and ecosystems.

A new Swedish study reveals that many common office coffee machines fail to filter out cholesterol-elevating compounds found in coffee, sometimes leaving behind even more than espresso or French press. Depending on the machine and brewing method, the amount of harmful diterpenes like cafestol and kahweol can vary widely, and frequent coffee drinkers may be unknowingly boosting their LDL cholesterol levels.

Summary

NASA’s Curiosity rover discovered the largest organic compounds ever detected on Mars in a 3.7-billion-year-old rock sample from Yellowknife Bay.

The compounds, including long-chain alkanes, could result from chemical reactions or remnants of ancient Martian life.

Scientists found hints of fatty acid patterns similar to those in terrestrial biochemistry, but no definitive evidence of life.

Researchers call it the best opportunity yet to identify potential life remnants on Mars, though further analysis requires returning the samples to Earth for isotope testing.

This is a question regarding atomic and quantum physics, and any academic input would be appreciated. I am wanting some input on what level of trust I should put into this "Quicycle" group. It's a think tank comprised of supposed Doctors from CERN and research groups, and states their names. alot of their stuff raises red flags for me, though.

To preface, I was working on understanding how exactly, in 3d space, electron orbitals affect the magnetic field of their atoms. I'm wanting to better understand why atoms like Iron are more magnetic than others. I am not heavily plugged into the physics community, though - I'm mostly just learning out of personal curiosity.

I stumbled upon this group's periodic table of atomic orbitals, and it seems accurate on its face to a layman like myself. However, I start trying to research some of the terms and they're proposing things I've never heard of like pd-hybridization (where the p and d electron orbitals merge(?) to produce a hybrid orbital(?)).

I decided to look over their site with more rigor and I'm seeing things like Vivian Robinson: The Common Sense Universe (talking about 'common sense' when talking about quantum and "sub-quantum" mechanics seems really screwy) and M.A.R.T. (yet another theory of everything attempt) and I get a sinking feeling that nothing in this website is trustworthy for learning more in-depth physics.

Does any of this stuff look right to any Lemmy physicists?

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Rethinking repression − why memory researchers reject the idea of recovered memories of trauma

Memories and photos both can misrepresent the past. Westend61 via Getty Images

Gabrielle Principe, College of Charleston

In 1990, George Franklin was convicted of murder and sentenced to life in prison based on the testimony of his 28-year-old daughter Eileen. She described seeing him rape her best friend and then smash her skull with a rock.

When Eileen testified at her father’s trial, her memory of the murder was relatively fresh. It was less than a year old. Yet the murder happened 20 years earlier, when she was 8 years old.

How can you have a one-year-old memory of something that happened 20 years ago? According to the prosecution, Eileen repressed her memory of the murder. Then much later she recovered it in complete detail.

Can a memory of something so harrowing disappear for two decades and then resurface in a reliable form?

This case launched a huge debate between memory researchers like me who argue there is no credible scientific evidence that repressed memories exist and practicing clinicians who claim that repressed memories are real.

This controversy is not merely an academic one. Real people’s lives have been shattered by newly recollected traumatic experiences from childhood. I’ve seen this firsthand as a memory expert who consults on legal cases involving defendants accused of crimes they allegedly committed years or even decades ago. Often the only evidence linking the defendant to the crime is a recovered memory.

But the scientific community disagrees about the existence of the phenomenon of repressed memory.

Freud was the father of repression

Nineteenth-century psychoanalytic theorist Sigmund Freud developed the concept of repression. He considered it a defense mechanism people use to protect themselves from traumatic experiences that become too overwhelming.

The idea is that repression buries memories of trauma in your unconscious, where they – unlike other memories – reside unknown to you. They remain hidden, in a pristine, fixed form.

In Freud’s view, repressed memories make themselves known by leaking out in mental and physical symptoms – symptoms that can be relieved only through recovering the traumatic memory in a safe psychological environment.

In the 1980s, increasing numbers of therapists became concerned about the prevalence of child sexual abuse and the historical tendencies to dismiss or hide the maltreatment of children. This shift gave new life to the concept of repression.

Rise of repressed memory recovery

Therapists in this camp told clients that their symptoms, such as anxiety, depression or eating disorders, were the result of repressed memories of childhood sexual abuse that needed to be remembered to heal. To recover these memories, therapists used a range of techniques such as hypnosis, suggestive questioning, repeated imagining, bodywork and group sessions.

Did recovered-memory therapy work? Many people who entered therapy for common mental health issues did come out with new and unexpected memories of childhood sexual abuse and other trauma, without physical evidence or corroboration from others.

But were these memories real?

The notion of repressed memories runs counter to decades of scientific evidence demonstrating that traumatic events tend to be very well remembered over long intervals of time. Many victims of documented trauma, ranging from the Holocaust to combat exposure, torture and natural disasters, do not appear to be able to block out their memories.

In fact, trauma sometimes is too well remembered, as in the case of post-traumatic stress disorder. Recurrent and intrusive traumatic memories are a core symptom of PTSD.

No memory ≠ repressed memory

There are times when victims of trauma may not remember what happened. But this doesn’t necessarily mean the memory has been repressed. There are a range of alternative explanations for not remembering traumatic experiences.

Trauma, like anything you experience, can be forgotten as the result of memory decay. Details fade with time, and retrieving the right remnants of experience becomes increasingly difficult if not impossible.

Someone might make the deliberate choice to not think about upsetting events. Psychologists call this motivated forgetting or suppression.

There also are biological causes of forgetting such as brain injury and substance abuse.

Trauma also can interfere with the making of a memory in the first place. When stress becomes too big or too prolonged, attention can shift from the experience itself to attempts to regulate emotion, endure what’s happening or even survive. This narrow focus can result in little to no memory of what happened.

A forgotten memory isn’t just waiting around to be rediscovered – it’s gone. malerapaso/E+ via Getty Images

False memories

If science rejects the notion of repressed memories, there’s still one question to confront: Where do newly recollected trauma memories, such as those triggered in recovered-memory therapy, come from?

All memories are subject to distortions when you mistakenly incorporate expectations, assumptions or information from others that was not part of the original event.

Memory researchers contend that memory recovery techniques might actually create false memories of things that never happened rather than resurrect existing memories of real experiences.

To study this possibility, researchers asked participants to elaborate on events that never happened using the same sorts of suggestive questioning techniques used by recovered-memory therapists.

What they found was startling. They were able to induce richly detailed false memories of a wide range of childhood traumatic experiences, such as choking, hospitalization and being a victim of a serious animal attack, in almost one-third of participants.

These researchers were intentionally planting false memories. But I don’t think intention would be necessary on the part of a sympathetic therapist working with a suffering client.

Are the memory wars over?

The belief in repressed memories remains well entrenched among the general public and mental health professionals. More than half believe that traumatic experiences can become repressed in the unconscious, where they lurk, waiting to be uncovered.

This remains the case even though in his later work, Freud revised his original concept of repression to argue that it doesn’t work on actual memories of experiences, but rather involves the inhibition of certain impulses, desires and fantasies. This revision rarely makes it into popular conceptions of repression.

As evidence of the current widespread belief in repressed memories, in the past few years several U.S. states and European countries have extended or abolished the statute of limitations for the prosecution of sexual crimes, which allows for testimony based on allegedly recovered memories of long-ago crimes.

Given the ease with which researchers can create false childhood memories, one of the unforeseen consequences of these changes is that falsely recovered memories of abuse might find their way into court – potentially leading to unfounded accusations and wrongful convictions.

Gabrielle Principe, Professor of Psychology, College of Charleston

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Link to paper https://www.nature.com/articles/s43247-025-02074-x

Scientists in Florida believe they have identified a “tipping point” in atmospheric conditions in the Atlantic Ocean they say caused giant clumps of toxic seaweed to inundate beaches around the Caribbean in recent summers.

They identified atmospheric pressure changes over the Atlantic beginning around 2009 as the tipping point, with variations in circulation and wind patterns pushing more sargassum into the warmer waters of the tropics, where it grew through photosynthesis into the massive blooms that eventually ended up on the beaches of the Caribbean and the US Gulf coast.

Link to the study itself: https://doi.org/10.1016/j.arr.2024.102630

Although only a relatively long summary if you don't have University access.

cross-posted from: https://lemmy.world/post/27218964

Scripps Research scientists created a stable form of carnosic acid, observing greater memory function and other disease improvements in mice.

Summary

US immigration officers denied entry to a French scientist traveling to Houston after finding phone messages criticizing the Trump administration.

French research minister Philippe Baptiste condemned the decision, stressing the importance of academic freedom.

US authorities reportedly accused the scientist of "hateful and conspiratorial messages" but later dropped charges.

Baptiste has been vocal against Trump and Elon Musk for cutting research funding and invited American scientists to relocate to France.

The Leo Trio

https://apod.nasa.gov/apod/image/2503/image/_1236LeoTrio1024.JPG

This popular group leaps into the early evening sky around the March equinox and the northern hemisphere spring. Famous as the Leo Triplet, the three magnificent galaxies found in the prominent constellation Leo gather here in one astronomical field of view. Crowd pleasers when imaged with even modest telescopes, they can be introduced individually as NGC 3628 (bottom left), M66 (middle right), and M65 (top center). All three are large spiral galaxies but tend to look dissimilar, because their galactic disks are tilted at different angles to our line of sight. NGC 3628, also known as the Hamburger Galaxy, is temptingly seen edge-on, with obscuring dust lanes cutting across its puffy galactic plane. The disks of M66 and M65 are both inclined enough to show off their spiral structure. Gravitational interactions between galaxies in the group have left telltale signs, including the tidal tails and warped, inflated disk of NGC 3628 and the drawn out spiral arms of M66. This gorgeous view of the region spans over 1 degree (two full moons) on the sky. Captured with a telescope from Sawda Natheel, Qatar, planet Earth, the frame covers over half a million light-years at the Leo Trio's estimated 30 million light-year distance.

Attribution: Rabeea Alkuwari

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The Solar Eclipse Analemma Project

https://apod.nasa.gov/apod/image/2503/HunterWells/_submission3-3labelled1024.jpg

Recorded from 2024 March 10, to 2025 March 1, this composited series of images reveals a pattern in the seasonal drift of the Sun's daily motion through planet Earth's sky. Known to some as an analemma, the figure-eight curve was captured in exposures taken on the indicated dates only at 18:38 UTC from the exact same location south of Stephenville, Texas. The Sun's position on the 2024 solstice dates of June 20 and December 21 would be at the top and bottom of the curve and correspond to the astronomical beginning of summer and winter in the north. Points that lie along the curve half-way between the solstices would mark the equinoxes. The 2024 equinox on September 22, and in 2025 the equinox on March 20 (today) are the start of northern fall and spring. And since one of the exposures was made on 2024 April 8 from the Stephenville location at 18:38:40 UTC, this analemma project also reveals the solar corona in planet Earth's sky during a total solar eclipse.

Attribution: Hunter Wells

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Blue Ghost's Diamond Ring

https://apod.nasa.gov/apod/image/2503/eclipse-shot-from-blue-ghost-crop1024.jpg

On March 14 the Full Moon slid through Earth's dark umbral shadow and denizens of planet Earth were treated to a total lunar eclipse. Of course, from the Moon's near side that same astronomical syzygy was seen as a solar eclipse. Operating in the Mare Crisium on the lunar surface, the Blue Ghost lander captured this video frame of Earth in silhouette around 3:30am CDT, just as the Sun was emerging from behind the terrestrial disk. From Blue Ghost's lunar perspective the beautiful diamond ring effect, familiar to earthbound solar eclipse watchers, is striking. Since Earth appears about four times the apparent size of the Sun from the lunar surface the inner solar corona, the atmosphere of the Sun most easily seen from Earth during a total solar eclipse, is hidden from view. Still, scattering in Earth's dense atmosphere creates the glowing band of sunlight embracing our fair planet.

Attribution:

@[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] @[email protected] #space #science #nasa #astronomy