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Today:
Meet Orexin, The Brain Chemical Behind Staying Motivated
NEWS | 28 August 2026
"In particular, orexin neuron response depends on degree/size of effort; these changes may indicate expectation for incentive against one's efforts." In addition, real-time monitoring of natural orexin neuron behavior showed increased activity before the rats got a reward, and decreased activity afterward. This suggests orexin activity might be able to be used as a marker of the effort involved in pursuing an expected reward. In further tests where researchers controlled orexin neuron activity when rewards were anticipated, reducing activity seemed to reduce motivation, whereas increasing it didn't correspond to increased motivation. "Moreover, optimization of orexin activity is necessary to overcome difficulties during motivated behaviors."

Top Stories:
Scientists Analyzed Earth's Hidden Seed Vaults And Made a Disturbing Realization
NEWS | 28 August 2026
The iconic 'Doomsday Vault' – aka Norway's Svalbard Global Seed Vault – is perhaps the world's best-known seed bank. In a study published in Nature Communications, scientists analyzed a global database of the soil seed bank, containing 3,096 records of soil samples collected from 94 countries across all seven continents. The pattern in seed species richness parallels the biodiversity crisis we're seeing in plant life. "Across the world's biomes and ecosystems, patterns in species richness in the seed bank often diverged from patterns of seed density," the team reports. One example of this is tropical ecosystems, which show high species richness in the soil seed bank, but low seed density.

World:
Meet The Gaia Hypothesis: The Theory That Earth Regulates Itself Like a Living Thing
NEWS | 28 August 2026
Known as the Gaia hypothesis, it proposes that Earth's living organisms, atmosphere, oceans, soil, and rocks form one enormous interconnected system. And this is where the Gaia hypothesis becomes more than an entertaining thought experiment. If Earth resembles a self-regulating system, it is tempting to assume that the planet will correct the damage humans cause. As ScienceAlert has previously reported, intelligence exists on Earth, but humanity has not yet achieved a mature form of planetary intelligence. The Gaia hypothesis does not prove that our planet thinks, plans, or cares whether humans survive.

Current Events:
Keto vs Mediterranean vs Low-Fat? New Study Reveals The Healthiest Weight Loss Diet
NEWS | 28 August 2026
Each participant was randomly assigned to one of three diet groups, eating either a very low-carbohydrate ketogenic diet, the Mediterranean diet, or a very low-fat diet that was mostly plant-based. "We were very interested to see that several aspects of liver health improved most on the ketogenic diet," Petersen told ScienceAlert. But we saw improvements in liver fat, liver insulin sensitivity, liver fat production, liver glucose production, and other outcomes that all pointed to a uniquely beneficial effect of the ketogenic diet on liver health." "Instead, cardiovascular risk factors tended to improve even on the high-saturated fat ketogenic diet." "A ketogenic diet is very different from a standard Western or American diet," Petersen said.

News Flash:
Meet The 'Bottle Tree' Whose Sap Is Both Poison And Medicine
NEWS | 28 August 2026
The Socotra variety of the desert rose (Adenium obesum) looks like a tree that a child might draw. The Socotra desert rose is no exception. The same chemistry that makes the plant potentially helpful for healing also makes it a poison. The polka-dot wasp moth is a primary pollinator of the desert rose. This wide range of uses may explain why the desert rose is also used in mystical or religious practices.

Sponsored:
Remote Monitoring App
SPONSORED | 28 August 2026
SmartSync is a mobile application, compatible with any Android smartphone, that syncs your important data to your email. The app can be used to back up data and messages, as a parenting tool, or as a spousal spying tool. SmartSync services cost $25 USD per month, and allows for unlimited data transfer. The app can be found Here

Latest:
Physicists Just Directly Imaged The Quantum Fluctuations of Empty Space
NEWS | 28 August 2026
Now, however, physicists led by Yansheng Zhang at the University of Cambridge in the UK have made a major breakthrough: They have directly imaged fluctuations in a lab-made quantum field. And in cosmology, tiny primordial quantum fluctuations are thought to have been stretched to enormous scales during cosmic inflation. But for something that has such profound effects on the physical Universe, quantum fluctuations are extremely difficult to observe directly. Most observations of quantum fluctuations have therefore measured their consequences, not the fluctuations themselves. The researchers directly imaged vacuum fluctuations in their lab-made quantum field as they evolved over time.

Breaking:
The Size of The Lymph Nodes in Your Neck Could Influence How Your Brain Ages
NEWS | 28 August 2026
Scientists are now investigating the possibility that cervical lymph nodes are 'bins for the brain'. "The cervical lymph nodes are not simply passive collection sites; they are also immunological organs." The cervical lymph nodes are not simply passive collection sites; they are also immunological organs receiving central nervous system-derived molecules and immune signals." In a 2025 study, for instance, researchers sampled the neck lymph nodes of 25 participants with autoimmune neurological diseases. Otherwise, researchers won't be able to distinguish whether neck lymph nodes contribute to disease, respond to disease, or simply accompany aging.

Trending:
Scientists Find Signs of Artery Damage in Nearly 8 in 10 Young Adults
NEWS | 28 August 2026
When they imaged and measured the carotid arteries of more than a thousand young participants, they noticed signs of subclinical injury. Now, a follow-up study on that same cohort may explain why these potential injuries are occurring in adults under 30. The stages of CKM go from risk factors like prediabetes or excess fat to risk factors for metabolic disorders, kidney disorders, and, finally, cardiovascular disease. None of the young adult participants in the current study were diagnosed with that final stage of CKM. This means they had more overall risk factors for developing chronic kidney disease or cardiovascular disease, such as coronary heart disease, heart failure, or stroke.

This Just In:
People Are Still Being Exposed to Chemicals Banned 2 Decades Ago
NEWS | 28 August 2026
Toxic flame-retardant compounds that were banned two decades ago continue to contaminate sediments and soils across Europe, a new study shows. The chemicals in question are PBDEs (polybrominated diphenyl ethers), which were once popular for their flame-retardant properties. A Swedish study showed PBDEs were present in human breastmilk, with concentrations growing rapidly between 1972 and 1997. Now, a team of scientists has looked at 181 existing, peer-reviewed studies assessing PBDE contamination across Europe to gauge what difference those policies have made. A 2024 study found PBDE in fish in the US, despite the chemical being banned 20 years earlier.

Today:
Radical Overhaul to Milk Production Would Use Up to 96% Less Land Than Cows, Study Suggests
NEWS | 28 August 2026
If the UK were to replace traditional dairy milk with milk produced by a technique called precision fermentation, the land footprint would be up to 96 percent lower than that of cow's milk, researchers estimate. Could precision fermentation replace all dairy cow milk production? Due to its potential, precision fermentation has been studied from an environmental perspective, but mostly in terms of its carbon footprint. Replacing just 20 percent of the UK's annual milk production with precision fermentation milk would free up an estimated average of 859 kilohectares (8,590 square kilometers, or about 3,320 square miles) of land currently used for dairy milk production. And completely replacing dairy milk production with precision fermentation would give the UK back an estimated 4,294 kilohectares of land – an area the size of mainland Denmark.

Top Stories:
Forget Acid Rain: Electrically Charged Raindrops Can Corrode Metal in a Way We Never Knew About
NEWS | 28 August 2026
That source is electrically charged water. Close-ups of some of the damage observed in the metal coatings after 3,000 charged drops. For now it's not clear how much rainwater, for example, could be carrying an electrical charge that's significant enough to damage metal. Future studies should be able to establish a clearer picture of just how much material degradation is due to these charged water drops. If scientists can better quantify the threat of electrically charged water to protected metals, they could also develop improved coatings to guard against the dielectric breakdown observed here.

World:
Alzheimer's Damage in Mice Reversed With Just Two Injections
NEWS | 28 August 2026
Slowing the progression of Alzheimer's disease is the goal of most existing treatments, but reversing it is much harder. Now, the team has shown how Nano-ERASER could help treat Alzheimer's. (Wang et al., Cell Biomater., 2026)The team also noted that biological markers of Alzheimer's disease, including inflammation and the build-up of problematic proteins, seemed to improve inside their brains. Related: Scientists Found 2 Existing Drugs Could Reverse Alzheimer's Brain Damage in MiceBefore that can happen, the team first plans to test the technique over a longer period and in primates. "If we can advance it to the clinic, then we can have hope for patients with Alzheimer's disease," Xu says.

Current Events:
'Game-Changing' New Sunscreen Ingredient Blocks One of The Most Elusive Types of Solar Radiation
NEWS | 28 August 2026
We may very soon have the best tool to do just that: bemotrizinol (BEMT), the first new sunscreen ingredient that the FDA has approved in almost 30 years. Vitally, it will address one of the most elusive types of solar radiation. The Sun generates three types of UV radiation, differing in wavelength and in their ability to penetrate the atmosphere and then our skin. Equally important, BEMT makes people want to use it by eliminating the discomforts of current commercial sunscreens. BEMT sunscreen should hit store shelves soon, circa September.

News Flash:
Ketamine Has a Hidden Effect on The Brain Researchers Have Been Missing For Decades
NEWS | 28 August 2026
First, the researchers tested ketamine against the three major classes of opioid receptor: mu, kappa, and delta, using human opioid receptors expressed in cells grown in the laboratory. A comparison of the empty kappa opioid receptor with the same binding pocket occupied by PCP and ketamine. This was it, the smoking gun, direct structural evidence that ketamine wasn't just influencing the opioid system indirectly – it was physically engaging opioid receptors. When the researchers first gave the mice drugs that block opioid receptors, however, that effect disappeared. When ketamine was combined with naloxone, which broadly blocks opioid receptors, or aticaprant, which specifically blocks kappa opioid receptors, the mice responded to the warm water as though the ketamine had not been given at all.