401
Theo Jansen has been constructing large-scale, kinetic beings powered entirely by wind since 1990. Based on a planar leg mechanism known as Jansen's linkage, you can often see them waddle, wriggle, or slither across a Dutch beaches strandbeest.com
402
Controlled by servo-motors and an Arduino Uno, this scented tree moves respecting the physics of an actual car in motion for an immersive gaming experience
[source + more info, Reddit's u/JamesF890: buff.ly/3T5ZyA5]
403
This video shows some interesting physics concepts: the levitation with compressed air obtained with the Coandă effect and Newton's third law of motion, plus the apple explosion triggered by the centrifugal force
[📹 Slow Mo Guys: buff.ly/3QGiHad]
404
The story of the 1983 Steve Jobs letter where he informed the sender that he did not sign autographs, paradoxically leaving his signature at the bottom of the page. It sold at an auction in 2021 for $500k
[read more: buff.ly/3QHWd8P]
405
Egypt’s Great Pyramid of Giza used to look very different from the way it does now. When it was first completed around 2560–2540 BC, the pyramid’s original external walls of Tura limestone casing stones were sanded smooth to shine bright white [source: buff.ly/2A9060G]
406
Polyethylene glycol is a liquid that can pour itself out of a container due to it’s very long chains of linked molecules buff.ly/2pPrqLW [source of the gif, YT's The Action Lab: buff.ly/2BEBWM8]
407
Paranyu Pithayarungsarit is a photographer whose shots won a long series of international awards. Here, a large red sand dune in Namib desert during sunset splits the landscape between darkness and light [other pictures by the author: 500px.com/tontoxin]
408
This picture by Steve Curle is probably true and not digitally manipulated. It shows a 5 meter crocodile killed in Zimbabwe after becoming a problem animal which had been attacking and killing fully grown cows [read more on Snopes.com: buff.ly/30cCZRl]
409
Attacus atlas is a large saturniid moth endemic to the forests of Asia. Its Cantonese name translates as "snake's head moth," referring to the prominent extension of the forewing which bears resemblance to the head of a snake [read more: buff.ly/2J9lJBl]
410
This small canyon is called “The Seven Teacups” and can be found in the Eastern Sierras of Southern California: the high velocity of the water swirled the granite around, carving out the bottom of each so called pothole and making it deeper and deeper: buff.ly/2utvpDl
411
Morpho rhetenor is sexually dimorphic and while the female is dark-brown, the male's wings are impressively bright blue. This short clip by biologist Joseph See neatly shows it [source: buff.ly/3GNRhuA] [read more: buff.ly/3CIff7S]
412
If you are a fan of space exploration, it's strongly recommended that you take the time to explore this map in high resolution. Cosmic Journey by Sean McNaughton, Samuel Velasco [source, read more: buff.ly/2QOZQ1N]
413
The Gee's golden langur is one of the world's 25 most endangered primate species, threatened by habitat destruction and forest fragmentation: the total population of mature adults has been estimated as 6000–6500
[📹 Joel Sartore: buff.ly/3Afwsp7]
414
A propeller driven shower head uses micro-holes and built in propeller to force the water to shoot out at higher speed and pressure [read more: buff.ly/3nXGV2F] [gif: buff.ly/3bFI9d3]
415
This classic short film shows how to make an igloo using only snow and a knife. Two Inuit men in Canada’s Far North choose the site, cut and place snow blocks and create an entrance--a shelter completed in one-and-a-half hours [full video: ow.ly/Ia6r30n6nu3]
416
Artist Jonty Hurwitz creates amazing anamorphic sculptures that can only be seen in their own reflections [source, more artworks: buff.ly/2GiWbju] [more about anamorphosis: buff.ly/2GjoPko]
417
The story of the hipster who complained to MIT Technology Review in 2019 for using his picture to imply hipsters look the same, end up discovering the picture was of an entirely different hipster [full story: buff.ly/3h6Aru7]
418
Depending on the light the shape of a domestic cat’s pupil changes from vertical slit to almost fully round. Overall a cat’s pupils can expand by 135-fold and can perform like built-in night vision goggles. By contrast human pupils expand by a factor of 15 buff.ly/2J3Y6tZ
419
Stotting (also called pronking or pronging) is a behavior of quadrupeds in which they spring into the air, lifting all four feet off the ground simultaneously [read more: bit.ly/2CPwGVi-] [video by Dave Mott: buff.ly/3ELDin7-]
420
Considering pictures or long-distance views, you might have a somewhat static perception of an aurora. This real time video by Matthew Robinson give you a hint how dynamic and colorful are northern lights in the sky [source: buff.ly/2ZWniPO-]
421
These flames are touchable. They are not even flames, actually as they are made by water vapor lit by LED lights [source: ow.ly/DZf230n7xFw]
422
Among the things that you might not know about antimatter there's the fact that bananas produce antimatter, releasing one positron—the antimatter equivalent of an electron—about every 75 minutes.That's because bananas contain a small amount of potassium-40 buff.ly/2Jbd41p
423
The red-capped manakin's "moonwalk" to impress the ladies [source and full video: buff.ly/2uA52f9]
424
Fire obsidian is an iridescent variety of obsidian. Its 'fire' is caused by thin layers of microcrystals of magnetite (which are approximately the thickness of a wavelength of light) [source, read more: buff.ly/2J0nQrl]
425
The James Webb Space Telescope captured images of Jupiter and its moons Amalthea and Adrastea on July 27, 2022. Also visible in the false color Near Infrared Camara (NIRCam) images are the gas giant planet's rings and auroras [read more: buff.ly/3QFcuuV]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links