interesting-things-i-like-2021

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Practical tip for those dealing with wildfire smoke now: you can make a very effective air filter for a reasonable amount of money using a box fan & one of those filters meant for your furnace.

Also, I've managed to pick up 2 of the box fans for very cheap/free from yard sales. Make sure you get a filter rated for wildfire smoke, I think this one cost about $20.

These make a huge difference in the indoor air quality.

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An epic find of a Roman pot and Iron Age cauldron and vessels in the Welsh Countryside paint a vivid picture of life 2000 years ago. These unearthed treasures found in Wales have sparked a great deal of curiosity and wonder!

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sadieellenorgrace

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Sleeping on the job

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https://vm.tiktok.com/ZMYu6XFtM/

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Civita di Bagnoregio , Italy 🇮🇹

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2,300-Year-Old Plush Bird from the Altai Mountains of Siberia (c.400-300 BCE): this artifact was crafted with a felt body and reindeer-fur stuffing, all of which remains intact

This stuffed bird was sealed in the frozen barrows of Pazyryk, Siberia, for more than two millennia, where a unique microclimate enabled it to be preserved. The permafrost ice lense formation that sits just beneath the barrows provides an insulating layer, preventing the soil from heating during the summer and allowing it to quickly freeze during the winter; these conditions produce a separate microclimate within the stone walls of the barrows themselves, thereby aiding in preservation.

This is just one of the many well-preserved artifacts that have been found at Pazyryk. These artifacts are attributed to the Scythian/Altaic cultures.

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The Penrose process:

(also called Penrose mechanism) is theorised by Sir Roger Penrose as a means whereby energy can be extracted from a rotating black hole. The process takes advantage of the ergosphere — a region of spacetime around the black hole dragged by its rotation faster than the speed of light, meaning that from the point of an outside observer any matter inside is forced to move in the direction of the rotation of the black hole.

In the process, a working body falls into the ergosphere. At its lowest point the body fires a propellant backwards; however, to a faraway observer both seem to continue to move forward due to frame-dragging (albeit at different speeds). The propellant, being slowed, falls to the event horizon of the black hole. And the remains of the body, being sped up, fly away with an excess of energy.

The maximum amount of energy gain possible for a single particle decay via the original (or classical) Penrose process is 20.7% of its mass in the case of an uncharged black hole (assuming the best case of maximal rotation of the black hole). The energy is taken from the rotation of the black hole, so there is a limit on how much energy one can extract by Penrose process and similar strategies (for an uncharged black hole no more than 29% of its original mass; larger efficiencies are possible for charged rotating black holes).

Via Wikipedia

Animation:  © Eugene Pylinsky

Throat singing: The Gyuto Monks of Tibet

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it is human nature to weave strings of yarn, threads, or fibers together to make cloth and textiles

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Cat sonar: locating human

(via)

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How does anyone hate kids they are so funny I sold tickets to incredibles to this little girl and her mom and she’s like mom are we sitting next to each other and the moms like ya and the kid screamed YES so loud it broke my ears

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Boom, Boom, Boom, Boom!!

Source

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Kallur Lighthouse, Faroe Islands

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Stockpile of 2,000-year-old gemstones found in Roman bathhouse drain

Archaeologists recently uncovered a stockpile of 2,000-year-old glittering gemstones clogging the drain of a Roman bathhouse near Hadrian’s Wall in Carlisle, England.

The 30 engraved, semi-precious stones — known as intaglios — likely dropped out of the ring settings worn by bathers who took to the waters sometime during the second and third centuries A.D., The Guardian reported.

“It’s incredible,” Frank Giecco, the archaeologist who led the excavation, told The Guardian. “It’s caught everyone’s imagination. They were just falling out of people’s rings who were using the baths. They were set with a vegetable glue and, in the hot and sweaty bathhouse, they fell out of the ring settings.” Read more.

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