Carbon Source found on Surface of Jupiter’s Moon Europa

Astronomers using data from NASA’s James Webb Space Telescope have identified carbon dioxide in a specific region on the icy surface of Europa.

Jupiter’s moon Europa is one of a handful of worlds in our solar system that could potentially harbor conditions suitable for life. Previous research has shown that beneath its water-ice crust lies a salty ocean of liquid water with a rocky seafloor. However, planetary scientists had not confirmed if that ocean contained the chemicals needed for life, particularly carbon.

Astronomers using data from NASA’s James Webb Space Telescope have identified carbon dioxide in a specific region on the icy surface of Europa...

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Study finds Dopamine Regulates How Quickly and Accurately Decisions are made

Dopamine regulates how quickly and accurately decisions are made
Behavioral data. Response time (RT) distributions (n = 31, within-subject design) under Placebo (a), L-dopa (b), and Haloperidol (c). Choices of the suboptimal (20% reinforced) options in (a–c) are coded as negative RTs, whereas choices of the optimal (80% reinforced) options are coded as positive RTs. d Accuracy per drug condition (chance level is 0.5). e Total rewards earned per condition. f Median RT per drug condition. Pl – Placebo, L – L-dopa, H – Haloperidol. For boxplots, lines represent the median, the box covers the upper and lower quartiles, and the whiskers denote the range of datapoints falling within 1.5 times the interquartile range. Credit: Nature Communications (2023). DOI: 10.1038/s41467-023-41130-y

A recent study provides new insight into the relat...

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Machine Learning Models can produce Reliable Results even with Limited Training Data

Machine learning models can produce reliable results even with limited training data
Elliptic PDE learning methods can be data-efficient. Credit: Proceedings of the National Academy of Sciences (2023). DOI: 10.1073/pnas.2303904120

Researchers have determined how to build reliable machine learning models that can understand complex equations in real-world situations while using far less training data than is normally expected.

The researchers, from the University of Cambridge and Cornell University, found that for partial differential equations—a class of physics equations that describe how things in the natural world evolve in space and time—machine learning models can produce reliable results even when they are provided with limited data.

Their results, reported in the Proceedings of the National Academy of Sciences, could be useful for constructing more t...

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New Recipes for Origin of Life may point way to Distant, Inhabited Planets

In an artist's rendering, a swirl of planets in blue and orange hues spiral toward a bright orange vortex in the center of the image. Chemical formulas appear written on the planets.
Life requires repetition of chemical reactions. Describing the kinds of reactions and conditions required for self-sustaining repetition — called autocatalysis — could focus the search for life on other planets. Betül Kaçar

Life on a faraway planet—if it’s out there—might not look anything like life on Earth. But there are only so many chemical ingredients in the universe’s pantry, and only so many ways to mix them. A team led by scientists at the University of Wisconsin–Madison has exploited those limitations to write a cookbook of hundreds of chemical recipes with the potential to give rise to life.

Their ingredient list could focus the search for life elsewhere in the universe by pointing out the most likely conditions—planetary versions of mixing techniques, oven tem...

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