Nexora

29/09/2026

Scientists are studying how aging changes the balance between activating and calming signals in the brain. A recent mouse study suggests that when calming signals become too strong in the prefrontal cortex, the region involved in planning and memory, learning and recall can become less efficient. In this state, brain circuits may become too quiet to respond quickly to new information.

The mechanism involves inhibitory neurons that use chemical messengers like GABA to reduce activity in brain networks. This braking system is important because it prevents overstimulation and keeps brain activity stable. However, when inhibition becomes too dominant, it can reduce flexibility in neural circuits. In experiments, increasing this braking signal in young animals made their memory performance resemble that seen in older brains.

This matters because memory depends on the brain’s ability to strengthen and adjust connections based on experience. If inhibitory signals become too strong, the brain may struggle to adapt, which can slow learning and weaken recall. The finding shifts focus in brain aging from only neuron loss to how well brain circuits balance activation and inhibition over time.

RESEARCH PAPER 📄
DOI: 10.1016/j.nbd.2026.107385

26/09/2026

Scientists analyzing large human genomic datasets have found that certain stretches of DNA become more unstable as people age, but the speed of this change is not the same for everyone. These DNA regions, made of short repeated sequences, tend to slowly expand in blood cells over time. The new findings show that inherited genetic differences can make this expansion happen up to four times faster or slower depending on the person.

The mechanism involves DNA repair systems that normally correct errors during cell division. Repeated DNA sequences are especially difficult for these repair systems to maintain accurately. When repair proteins are less efficient or behave differently due to genetic variation, small copying errors accumulate in these repeat regions. Over time, this leads to gradual expansion of the sequences, increasing genomic instability. Some of these expanded repeats are already known to disrupt normal gene function and are linked to diseases such as neurological and metabolic disorders.

This matters because it shows aging-related DNA change is not purely random but partly programmed by inherited biology. Understanding which genes control repeat stability could help identify individuals at higher risk for certain diseases and open new strategies to slow harmful DNA changes. It also reinforces the idea that genome maintenance is a dynamic process that continues to shape health throughout life.

RESEARCH PAPER 📄
DOI: 10.1016/j.celrep.2025.116386

26/09/2026

02/09/2026

NASA has selected Jeff Bezos’ Blue Origin to develop a next-generation communications network for Mars, making a consequential bet on the company’s rapidly developing spacecraft business with a contract worth up to $700 million. The network will provide reliable, high-bandwidth communications and navigation services for NASA missions to the Red Planet. https://www.forbes.com/sites/jamiecartereurope/2026/09/02/nasa-bets-700-million-on-jeff-bezos-blue-origin-for-mars-missions/?utm_source=ForbesMainFacebook&utm_medium=social&utm_campaign=ForbesMainFB
📸: Joe Raedle via Getty Images

01/09/2026

Replanting forests after wildfires, logging, or land degradation is often slow, expensive, and difficult in remote areas. Researchers and environmental organizations are now using drones to speed up the process by scattering specially designed seed pods from the air. Guided by high resolution maps, cameras, and sensors, the drones identify the best planting locations and distribute seeds with remarkable precision, allowing large areas to be restored much faster than manual planting.

The seed pods contain more than just seeds. They are wrapped in biodegradable materials mixed with nutrients and, in some cases, beneficial microorganisms that help protect young seedlings and support early growth. After planting, drones can return to monitor seedling survival, map vegetation, and identify areas that need additional planting. This combination of planting and monitoring makes forest restoration more efficient while reducing labor and costs in difficult terrain.

Drone technology is not intended to replace traditional forestry but to complement it where conventional methods are too slow or inaccessible. By helping restore forests more quickly, these systems could strengthen biodiversity, increase carbon storage, reduce soil erosion, and support the recovery of ecosystems that play a vital role in regulating Earth's climate.