251
Visualization of Newton's first law with dirt on a tennis racket, in slow motion.
[source of the gif, IG's philip_tennis: buff.ly/3mk0rqm]
[Newton's first law explained: buff.ly/3pI8csh]
252
The butterfly curve is a transcendental plane curve discovered by Temple Fay, whose polar equation is:
r = eˢⁱⁿᶿ - 2 cos4θ + sin⁵[(2θ-π)/24]
It's probably one of the most elegant and aesthetically beautiful mathematical curves: buff.ly/2AjKURQ
253
Meet MorpHex MKIII, the transforming robot [source, full video: buff.ly/2Loh0gC]
254
Kitchen countertops like Invisacook have induction hobs that can be positioned just under the countertop, heating the pans through the surface invisacook.com [read more about induction cooking: buff.ly/3nzisAw]
255
Playing with bubbles is an important part of dolphins' life. They can also create and manipulate bubbles and show a complex behavior during their play with bubbles [read more: buff.ly/2G2GGA0]
256
The bearded vulture is the only known animal whose diet is almost exclusively bone [read more: buff.ly/2FTYRrC]
257
Dusky woodswallows roost communally, usually nocturnally. On a cold morning in Queensland's Jimna Ranges, photographer Ken Cross came across a flurry of feathers. On closer inspection, he realised it was a cluster of roosting dusky woodswallows [source: buff.ly/3amuE1Z]
258
This underwater rodeo was caught on camera by NatureFootage contributor Harrison Stubbs in the waters off Guadalupe Island in 2016, and at first glance, you may wonder which of the animals is doing the attacking [source 1: buff.ly/3CrZwd5, 2: buff.ly/33NZXga]
259
The Rolling Stones debuted their iconic Tattoo You album in 1981. In 2021, BostonDynamics issued their peculiar 40th celebration featuring the robot star Spot in a “Spot me up” version of ‘Start Me Up’ from Tattoo You 2021 [video: buff.ly/3mnKCPt-]
260
To prevent drying out in the hot sun of the dry season, the giant monkey frog secretes a form of organic ‘sun screen’ and applies it to its body [source, full video, BBC: buff.ly/2lhLK6Q]
261
A typical Walmart supercenter has a 5-acre parking lot, and it’s a wasteland, especially if you have to sweat your way across it under an asphalt-bubbling sun. Put a canopy over it, though, and it could support a 3-megawatt solar array [read more: buff.ly/3r7aeTD]
262
Mount Roraima and the other tabletop mountains in Canaima National Park are considered to be the oldest geological formations on Earth, dating back around two billion years to the Precambrian Era [read more: buff.ly/2Lyzfm1]
263
For the past decade, Simon Beck has been decorating the Alps with his stunning mathematical drawings, created by running in snowshoes across freshly laid snow [read more: ow.ly/3bU930outWj] [video by Golem13: buff.ly/3tluTV8]
264
An F-22 Raptor doing a Power Loop: a maneuver utilizing the full capabilities of the thrust vectoring technology to rotate the aircraft through the air while remaining stationary within a single point in the sky
[📹 USAF F-22 Raptor Demonstration Team]
265
In 1924, The Metropolitan Museum released two films about Arms and Armor. "A Visit to the Armor Galleries" was especially popular and includes this famous scene that shows the flexibility of a medieval armor
[video + read more: buff.ly/3w6xhj0]
266
A peacock's feathers have fiber-like components called barbules, whose periodic nanostructures produce the train's colors through optical interference and Bragg reflections, resulting in their typical vibrant iridescent plumage: buff.ly/3bZjEeD
267
Manta rays have the largest known brain of any fish in the ocean. Underwater footage has even shown these rays are smart enough to give cleaner fish instructions, indicating to them which body parts need more attention [full video: buff.ly/3vS1Szk]
268
Laser ablation or photoablation is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. This laser cleaner can remove oil from engines block [source: buff.ly/2Utb0I4]
269
Disney's invention of the multiplane camera was a groundbreaking achievement in film, enhancing the feeling of depth in traditional animation. This clip shows the difference between a classic zoom vs a multiplane camera one [video: buff.ly/3dv2Qwo]
270
Scientists have hardly ever seen anglerfish alive in their natural environment. That’s why this video, captured in the waters around Portugal’s Azores islands, has stunned deep-sea biologists [source: buff.ly/2DJOTTP]
271
A weird phenomenon that you may have witnessed: when army ants lose the pheromone track, they begin to follow one another and will eventually die of exhaustion [read more: buff.ly/2UMMnFY] [source, by Milton Segura: buff.ly/2ZhJ50U]
272
The Pilatus Railway is a mountain railway in Switzerland and the steepest rack railway in the world, with a maximum gradient of 48% and an average gradient of 35%. This is a switch at the very beginning of the line [read more: buff.ly/3w9a6o5]
273
Octopuses have tiny pigment sacks inside their skin. By contracting or dilating their muscles very precisely, an octopus can control exactly how much light bounces off each pigment [source, by Jonathan Gordon + read more: buff.ly/3Gz8Iio]
274
23% of the world's fresh surface water - more than every American great lake combined - is in lake Baikal [source, read more: buff.ly/2G9hVl9]
275
California ground squirrels and rock squirrels chew up rattlesnake skin and smear it on their fur to mask their scent from predators. They also pick up pieces of shed snakeskin, chew it & lick their fur [read more: buff.ly/3pOkteF] [full video: buff.ly/3mpMmaZ]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links