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Science

Yale scientists discover how stress changes the brain to make memories stronger

Science via ScienceDaily
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Yale scientists have uncovered how the stress hormone cortisol helps the brain turn emotional experiences into stronger, longer-lasting memories. The discovery reveals that stress can reshape communication between brain networks involved in emotion and memory, potentially explaining why certain moments are so difficult to forget.

Yale scientists have uncovered how the stress hormone cortisol helps the brain turn emotional experiences into stronger, longer-lasting memories. The discovery reveals that stress can reshape communication between brain networks involved in emotion and memory, potentially explaining why certain moments are so difficult to forget.

Source: ScienceDaily

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Science

The ambiguous costs of climate change

As human activity has increased temperatures globally, determining the costs directly incurred by climate change is challenging. The effects of climate change on extreme weather events—such as hurricanes and heat waves—can be locally specific and variable, and observations and climate modeling might not accurately capture those effects.

via Phys.org
Science

Lone, starless cloud may be a ‘dark’ galaxy

Astronomers using China's FAST radio telescope have discovered a compact cloud of hydrogen with no visible stars or galaxy around it. This could be one of the strongest candidates yet for an isolated "dark galaxy," containing nearly 500,000 times the sun's mass in neutral hydrogen. The discovery paper was posted to the arXiv preprint server on Sept. 24.

via Phys.org
Science

Red-sensitive pigments in mantis shrimp eyes act as reversible light switches

With about 30 visual pigments, compared to just three in humans, mantis shrimp possess a visual system that remains a mystery. Researchers from ULiège and Humboldt University in Berlin have, for the first time, analyzed these pigments one by one and discovered that some detect red light that very few animals can perceive. This finding, published in Science Advances, has potential applications in optogenetics.

via Phys.org