Citazioni del sabato: antichi anarchici, tycoon sporcaccioni e un nuovo stato della materia.

19 agosto 2023

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by Chris Packham, Phys.org

This week on Phys.org, we published news about ancient anarchists, a hidden phase transition, dark matter developments, hot oceans and pollution taxes.

Questa settimana su Phys.org, abbiamo pubblicato notizie sugli antichi anarchici, una transizione di fase nascosta, sviluppi sulla materia oscura, oceani caldi e tasse ambientali.

This one's for all the homeys who reject justifications for social authority and seek to abolish institutions of coercion and hierarchy: Archaeologists from University College London unearthed a huge network of ceramic water pipes and drainage ditches at the Chinese walled site of Pingliantai dating to the Longshan period 4,000 years ago.

Notably, this complex network was engineered without the direction of any centralized state authority. 'The discovery of this ceramic water pipe network is remarkable because the people of Pingliangtai were able to build and maintain this advanced water management system with stone-age tools and without the organization of a central power structure. This system would have required a significant level of community-wide planning and coordination, and it was all done communally,' said Dr. Yijie Zhuang of UCL.

The site itself shows little evidence of a social hierarchy or stratification. The houses are 'uniformly small,' and a cemetery exhibits no evidence of hierarchy in funerary rites, in contrast to other excavations dated to the same period. According to the article, the Pinglangtai site demonstrates that egalitarian and communal societies were capable of mass engineering accomplishments.

Researchers at Lawrence Berkeley National Laboratory have detected molecular behavior representing a hidden phase of matter that is neither liquid nor solid, but a secret third thing.

Specifically, the Berkeley Lab researchers explain why supercooled liquids remain disordered like a liquid until making a sudden transition to a solid-like state at a specific point called the onset temperature. The materials become so viscous that they barely move, a state representing a previously unknown phase transition.

The scientists say this state separates supercooled liquids from normal liquids. The finding also sheds light on the mystery of amorphous materials like glass or plastic, which are essentially slow-flowing liquids, but which are rigid at the molecular level; it could eventually lead to amorphous materials with medical and industrial applications.

The New Horizons spacecraft was launched in 2006 and propelled across the solar system at 10.10 miles per second, somehow not the fastest speed of any spacecraft. Its mission was a flyby of ruggedly handsome, alleged non-planet Pluto, completed in 2015, and in accordance with the law of conservation of momentum, it just kept going.

New Horizons è ora molto, molto lontano, così distante che può effettuare misurazioni accurate dell'oscurità effettiva dell'universo.

Essendo l'unica sonda nello spazio profondo che può ancora trasmettere dati fotografici dall'esterno del sistema solare, il team della missione New Horizons ha puntato le sue telecamere su una zona del cielo al di là della Via Lattea, lontana dal sole e da ogni stella luminosa. Hanno confrontato la quantità di luce catturata con quella catturata dal punto di vista del cielo buio di Hubble e hanno scoperto, come previsto, che era molto più scuro - sebbene ancora molto più luminoso dell'oggetto immaginabile più buio (una bambola di C-3PO coperta di Vantablack).

If you thought coral reef bleaching was only for Australia, hold on to your dashing, open-crown Aussie slouch hat.

The Associated Press reports that the coral reef off southeast Florida is experiencing extreme and unprecedented bleaching due to rising ocean temperatures. Ocean temperatures have risen to above 32 degrees Celsius this summer—that's 90 degrees Fahrenheit in American—and experts say the best way to cool the waters at this point would be a hurricane or a tropical storm—exclamation point!

In yet another blow to beleaguered plutocrats, University of Massachusetts Amherst researchers used 30 years of data following the flow of carbon and income over 2.8 billion inter-sectoral financial transfers to calculate supplier-based and producer-based greenhouse gas emissions in the U.S.

And guess what? The top 10% of wealth holders create 40% of U.S. carbon emissions, which amounts to a pretty good argument that the tax code could be a good multi-tool for a net zero framework. How? The authors suggest taxes focused not on consumption but rather on the climate intensity of investment incomes. Have a great weekend, oligarchs!

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