Science Daily

1. Stem cells reverse stroke damage and restore movement in mice

   Stem cell transplants helped regenerate stroke-damaged brain tissue in mice, producing new neurons and restoring lost motor function. The treatment also improved blood vessels, inflammation, and the blood-brain barrier, raising hopes that a similar approach could eventually help repair the human brain after stroke.

2. NASA just powered up Roman’s massive 300-megapixel camera

   NASA’s Roman Space Telescope has successfully activated its 300-megapixel infrared camera, which will capture enormous stretches of the cosmos with Hubble-like sharpness. Its planet-hunting coronagraph is also working as expected, putting Roman another major step closer to beginning science operations in 2027.

3. Scientists create a needle-thin brain implant that can do three jobs at once

   A new needle-thin brain implant can record neural activity, deliver drugs, and stimulate multiple brain regions using a single flexible fiber. Successful tests in mice suggest it could give scientists a more precise, less invasive way to study the brain and may eventually help treat neurological disorders such as epilepsy.

4. Stopping Ozempic may raise heart attack and stroke risk

   A large study suggests the cardiovascular benefits of GLP-1 drugs such as Ozempic, Wegovy, Mounjaro, and Zepbound can disappear surprisingly quickly when treatment stops. After two years off the medications, patients had a 22% higher risk of heart attack, stroke, and death compared with those who stayed on them.

5. Brain scans reveal a possible cause of long COVID fatigue and brain fog

   Researchers have found evidence that long COVID may damage dopamine releasing neurons in the brain, potentially explaining persistent fatigue, low motivation, slowed movement, and memory difficulties. The discovery could lead to new treatments that target the brain's dopamine system.