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Anonymous ID: 210421 July 15, 2020, 5:48 a.m. No.9967681   🗄️.is 🔗kun

Many behaviours that comprise sequences of actions involve flexible transition points between different actions. These transitions often follow syntactic rules that mean they are contingent on the context of the preceding sequence of actions. However, the neural basis of such syntax-guided transitions is not clear. Cohen et al. demonstrate that the activity of a subset of projections neurons (PNs) in the song premotor nucleus HVC of Serinus canaria canaries depends on preceding steps in the bird’s song and can predict future song transitions.

Canary song can be segmented into phrases: trills of repeated syllables. The transitions between phrases can depend on the sequence of preceding phrases, such that the identity of the next phrase in a sequence could be determined by the phrase one or more phrases beforehand. Such ‘complex transitions’ are thought to be guided by long-range syntax rules.

The authors developed an automated algorithm to segment and annotate more than 5,000 canary songs. This data set allowed the authors to analyse the rich repertoire of canary song and identify pairs of phrases that were always found in sequence and cases in which more than one phrase could follow a particular phrase. On average across birds, 15% of phrase types preceded complex transitions of different orders (that is, transitions depending on the preceding two, three four or five phrases).

 

https://www.nature.com/articles/s41583-020-0351-x

Anonymous ID: 210421 July 15, 2020, 5:51 a.m. No.9967700   🗄️.is 🔗kun   >>7722 >>7765

Scientists have discovered a celestial structure made of galaxies more than 1.4 billion light-years long and 600 million light-years deep in the skies over the South Pole, according to a report.

The South Pole Wall, as it has been dubbed, is situated along the southern border of the cosmos from the perspective of Earth, and consists of thousands of galaxies, hydrogen gas, dust and dark matter, Vice and MIT Technology Review explains. It's also one of the largest known structures in the universe.

The wall is among a number of structures that make up the cosmic web, including the Great Wall, the Bootes Void, the comparably sized Sloan Great Wall and the Hercules Corona-Borealis Great Wall, the largest known structure at 10 billion light-years wide, according to MIT.

 

https://www.foxnews.com/science/astronomers-discover-huge-galactic-wall-hidden-behind-milky-way