Stuff that is Interesting

[munkinnousu]

 

[Chronomancy]

Πάντα είχα απορία τι απέγιναν τα ποτάμια της Αθήνας. Εντάξει τον Κηφισό τον πρόλαβα κατά κάποιον τρόπο, αλλά για υπόλοιπα απλώς άκουγα.
Ψάχνοντας για τον Ιλισό βρήκα αυτό το εξαιρετικό κανάλι.

 

[Norshgaath]

'Underwater bicycle' propels swimmers forward at superhuman speed

French company Seabike has developed a swimming device that uses your own leg power to accelerate you through the water at superhuman speeds. This crank-driven pusher prop looks a bit like an underwater unicycle... We'd love to take one for a spin!

newatlas.com

 

[Norshgaath]

1 χιλιοστο του εγκεφαλου μας!!! 1 μολις mm!

Researchers have mapped a tiny piece of the human brain in astonishing detail. The resulting cell atlas, which was described today in Science1 and is available online, reveals new patterns of connections between brain cells called neurons, as well as cells that wrap around themselves to form knots, and pairs of neurons that are almost mirror images of each other.

The 3D map covers a volume of about one cubic millimetre, one-millionth of a whole brain, and contains roughly 57,000 cells and 150 million synapses — the connections between neurons. It incorporates a colossal 1.4 petabytes of data.

The brain fragment was taken from a 45-year-old woman when she underwent surgery to treat her epilepsy. It came from the cortex, a part of the brain involved in learning, problem-solving and processing sensory signals. The sample was immersed in preservatives and stained with heavy metals to make the cells easier to see. Neuroscientist Jeff Lichtman at Harvard University in Cambridge, Massachusetts, and his colleagues then cut the sample into around 5,000 slices — each just 34 nanometres thick — that could be imaged using electron microscopes.

Jain’s team then built artificial-intelligence models that were able to stitch the microscope images together to reconstruct the whole sample in 3D.

When examining the model in detail, the researchers discovered unconventional neurons, including some that made up to 50 connections with each other. Elsewhere, the model showed neurons with tendrils that formed knots around themselves. The team also found pairs of neurons that were near-perfect mirror images of each other.

Cubic millimetre of brain mapped in spectacular detail

Google scientists have modelled a fragment of the human brain at nanoscale resolution, revealing cells with previously undiscovered features.

www.nature.com

Οποιο ατομο θελει να το τσεκαρει, παει εδω

 

[Norshgaath]

Σχετικα με την πορφυρα

Tyrian purple: The lost ancient pigment that was more valuable than gold

For millennia, Tyrian purple was the most valuable colour on the planet. Then the recipe to make it was lost. By piecing together ancient clues, could one man bring it back?

www.bbc.com

Γαμημενοι ρωμαιοι, παντου να βρωμισουν το τοπο με πορφυροσκουπιδια

Roman snail dye found in UK for the first time

Experts say the pigment was worth more than gold and used to dye the clothes of imperial figures.

www.bbc.com

A chunk of Tyrian purple, roughly the size of a ping pong ball, was dug up at Carlisle Cricket Club as part of ongoing yearly excavations.

A Roman bathhouse was discovered at the site in 2017 and in the last three years 2,000 items including pottery, weapons, coins and semi-precious stones have been found. Lead archaeologist Frank Giecco said the find was of "international significance" and the first time the precious pigment had been discovered in the UK.

In 2021, tiles with a Roman imperial stamp were uncovered indicating a link to third century Emperor Septimius Severus.
Mr Giecco said that it could not be proved that the emperor visited the Carlisle building, but that there was "compelling evidence" to suggest it was linked to his imperial court.

 

[Norshgaath]

A Staggering 19x Energy Jump in Capacitors May Be the Beginning of the End for Batteries

It opens the door to a new era of electric efficiency.

www.popularmechanics.com