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Fear memories fade faster when brain immune cells engage key neurons, study suggests

Post-traumatic stress disorder (PTSD) and anxiety disorders are often characterized by fearful responses in specific situations that the mind learns to view as threatening. These fearful responses typically emerge following traumatic events or challenging life experiences, which prompt the brain to form unhelpful associations between specific stimuli and distressing events.

The fearful responses associated with PTSD or anxiety disorders can gradually diminish via a process known as fear extinction. This process entails the repeated exposure to a situation or stimulus perceived as threatening, but without any danger arising.

Understanding the neurobiological processes that support fear extinction could be very valuable, as it could help to devise new therapeutic strategies for treating symptoms of PTSD and anxiety disorders. While many past studies explored the role of neurons in fear extinction, fewer investigated the contribution of microglia, immune cells that reside in the brain and spinal cord.

It’s not just deep sleep: Anesthesia drives brain into a strange state doctors are only beginning to map

People often describe anesthesia as something that puts a patient in a “deep sleep.” An anesthesiologist enters the operating room, and part of their mission is to ensure that the patient is completely unaware of what is happening around them until they wake up, often several hours later. Scientists and doctors have long debated what happens to the brain under anesthetic drugs during a surgical procedure.

A new study by Yale School of Medicine’s Departments of Anesthesiology and Neurology published on May 11, 2026, in Proceedings of the National Academy of Sciences uncovers new insights which may change the way we describe being under anesthesia. The study, “Spectral mapping reveals a resemblance of the anesthetic brain state to both sleep and coma,” reveals that being anesthetized may be more than simply being “put to sleep.” It can potentially carry more similarities to being in a coma than we originally thought.

Frank J. Tipler: The Laws of Physics Say The Singularity is Inevitable!

13 years ago, a Tulane physicist told me I didn’t understand the laws of physics.

That’s why, he said, I can’t see why the Singularity is inevitable. Or why it’s perfectly compatible with Christianity.

Fair enough.

Dr. Frank J. Tipler is the cosmologist behind the Omega Point. He is a professor of mathematical physics at Tulane University, and the author of The Anthropic Cosmological Principle, The Physics of Immortality, and The Physics of Christianity.

He didn’t come on Singularity FM to soften his views. He came to defend them.

In one hour we covered:

Continue reading “Frank J. Tipler: The Laws of Physics Say The Singularity is Inevitable!” | >

Robotics’ End Game: Nvidia’s Jim Fan

Dream Zero: NVIDIA’s latest paradigm where a robot “dreams” its success in a world model before executing the motor commands in reality [[06:12](https://www.youtube.com/watch?v=3Y8aq_ofEVs&t=372)].

Jim Fan, who leads the embodied autonomous research group at Nvidia, returns to AI Ascent to argue that robotics is entering its end game — and that the playbook is already written. He walks through what he calls \.

A new approach to cancer vaccination yields more powerful T cells

MIT engineers have developed a new way to amplify the T-cell response to mRNA vaccines—an advance that could lead to much more powerful cancer vaccines and stronger protection against infectious diseases.

Most vaccines generate both antibodies and T cells that can target the vaccine antigen by activating antigen-presenting cells, such as dendritic cells. In this study, the researchers boosted the T-cell response with a new type of vaccine adjuvant (a material that can help stimulate the immune system). The new adjuvant consists of mRNA molecules encoding genes that turn on immune signaling pathways and promote a supercharged T-cell response.

In studies in mice, this mRNA-encoded adjuvant enabled the immune system to completely eradicate most tumors, either on its own or delivered along with a tumor antigen. The adjuvant also boosted the T-cell response to vaccines against influenza and COVID-19.

Water-based zinc batteries tackle a barrier that has long blocked cheap, stable renewable energy storage

Renewable energy technologies, such as solar cells and wind turbines, are becoming increasingly widespread in many countries worldwide. Reliably storing the electricity produced by these devices, so that it can be used later at times when sunlight or wind are scarce, would further improve their effectiveness as sustainable energy solutions.

A promising solution to store solar and wind energy entails the use of aqueous zinc (Zn) metal batteries. These are low-cost, safe and environmentally friendly batteries that store and release energy, leveraging water-based solutions and Zn anodes.

Despite their potential, Zn batteries have not yet achieved the desired efficiencies and long-term stability. This is because water molecules can break down during their operation and small structures called Zn dendrites form on the surface of zinc electrodes, both of which were found to reduce performance.

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