2326
A vertical wind tunnel (VWT) is a wind tunnel that moves air up in a vertical column. Its vertical orientation enables gravity to be countered by drag instead of lift, as experienced by a skydiver at terminal velocity.
[📹 buff.ly/3uk8iY7]
2327
How your food travels
[📹 Keith Siau: buff.ly/3Fp5Q8U]
[read more: buff.ly/3HfWGgi]
2328
In 1995, 14 wolves were released in Yellowstone National Park. No one expected the miracle that the wolves would bring
[video, HD: buff.ly/3C69xyG]
[read more: buff.ly/3dETKh3]
2329
How fast are you spinning around Earth's axis? This chart shows you the rotation velocity as a function of latitude bit.ly/2ioM0CR [source of the chart: buff.ly/2R2iulB]
2330
The Inca road system was the most extensive and advanced transportation system in pre-Columbian South America. It was at least 40,000 kilometres long (25,000 mi). Only 25% of the system remains visible today
[read more: ow.ly/t3ai50xn60g]
2331
There's an endemic Mexican maize (Sierra Mixe) that has aerial roots using bacterial colonies to fix nitrogen from the atmosphere
[read more: buff.ly/3VI8dZU]
[📷 A. Van Deynze]
2332
«All of the rocky and metallic material we stand on, the iron in our blood, the calcium in our teeth, the carbon in our genes were produced billions of years ago in the interior of a red giant star. We are made of star-stuff»
—Carl Sagan
buff.ly/3F6t1DY
2333
In the province of East Java, Indonesia, the gigantic Kawah Ijen volcanic complex stretches over 22 km. But it is more known for its "blue lava", arising from the burning of sulphur released from the earth
[source, read more: buff.ly/3is9yWl]
2334
Have you ever wondered how music was typed before computers? With music typewriters
[read more: buff.ly/3B7bj1O]
[📹 pbuttner, illustrating a rare 1953 music typewriter: buff.ly/3KqkVIb]
2335
The triple point occurs where the solid, liquid, and gas transition curves meet. It's the only condition in which all three phases can coexist, and is unique for every material. Water reaches it at 0.01° C and at a pressure of 0.006 atm
[📹UCSC Physics: buff.ly/2OMrpoC]
2336
Whale shark eating
[whale sharks' diet: buff.ly/2LHYCCd]
[📹 BBC America: buff.ly/3W5GG55]
2337
These cape lappet caterpillars respond to human voice and noise.
[📹 Overberg Renosterveld Conservation Trust: buff.ly/3iAR9a3]
[read more: buff.ly/3vN5LHb]
2338
Artist Sergi Cadenas realizes three-dimensional oil paintings which vary depending on the viewer’s perspective, introducing a kinetic, disturbingly suggestive dimension to our vision of reality
[more artworks: buff.ly/3itsmEJ]
2339
Biologists long believed lions band together to hunt prey. But Craig Packer has found that's not the main reason they team up. The lions’ behavior, communities, evolution, are shaped by one brutal force, what Packer calls “the dreadful enemy": other lions ow.ly/Xtxq30nYV1J
2340
Static electricity
It requires a separation of positive and negative charges, often obtained by rubbing different materials together
[📹 buff.ly/3P05wAE]
2341
It never gets old. When a helicopter's propeller is perfectly synced with the camera frame rate, the result is always astounding
[why it happens: buff.ly/34ZNsl5]
twitter.com/ScienceGuys_/s…
2342
Using long exposure photography and a custom built lighting rig covered in colored gels, Daniel Mercadante created what he calls Rainbow Roads
[read more: buff.ly/2Jw61Ds]
2343
This is a real photo of a male seahorse
[read more: buff.ly/3VvVAS1]
[📷 Nick More, Scuba Seraya, Bali: buff.ly/3VRaPVh]
2344
70 years ago #Today, a dense smog descended on London, England, that would last four days, causing at least 4,000 deaths and chaos for transportation as visibility was reduced to a few hundred yards bit.ly/2AVIVBW
2345
The story of William Dampier, pirate, explorer and naturalist. He circumnavigated the world 3 times studying zoology, botany and the ocean: landed in Australia 80 years before James Cook, and influenced Darwin’s thinking on the mutation of species buff.ly/2uBhKYA
2346
53 years ago #Today, the nascent #ARPANET grew to four nodes when ARPA connected computer network nodes at four universities. This is the chart of all the Internet at the end of 1969 bit.ly/2iTcUn3
2347
Buick created the first car touchscreen on its model Riviera in 1986. The technology was dropped because customers found it onerous and distracting
[read more: buff.ly/3iXRoa4]
[full video by doktorebuick: buff.ly/3tv2lbv]
2348
Thomas Young proved that light is a wave, described elasticity, capillary action, explained how our eyes see colors, compared 400 languages vocabulary, deciphered hieroglyphs and contributed to music theory. He is called "The last man who knew everything" buff.ly/3gcAiDo
2349
A shape-memory alloy (SMA) is an alloy that can be deformed when cold but returns to its pre-deformed ("remembered") shape when heated.
[read more: buff.ly/3F34VcT]
[source: buff.ly/3B9ZfwJ]
2350
The story of the tiger that in 1997 was wounded by a poacher who also stole part of its kill: the tiger found the poacher's cabin, destroyed his belongings, waited at least half a day for him to return, then killed and ate him
[read more: buff.ly/2IhMG4w]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links