2201
How locks and keys work
[video: buff.ly/2gRz85Q]
[gif: buff.ly/2Ea4Jue]
2202
Loading a standard Renaissance crossbow vs loading a Leonardo da Vinci's Rapid Fire Crossbow
[source, read more: buff.ly/3HKHSXr]
2203
Building and testing different LEGO mechanisms to create a water vortex inside an enclosed plastic ball and explore fluid mechanics
[full video, Brick Technology: buff.ly/3ABTxTi]
2204
A recent research found that a cup of tea made with plastic teabags may come with a dose of micro- and nano-sized plastics (the latter being less than 100 nanometers in size) shed from the bags. Health effects are currently unknown [read more: buff.ly/2lLK75g]
2205
The green shield bug (Palomena prasina) lays its eggs in hexagonal batches of 25 to 30, and a single female will lay three to four batches. Each egg frequently shows marks on it and sometimes pareidolia makes the rest buff.ly/30JyF8I [photo: buff.ly/30Okv6m]
2206
Timelapse footage recorded on New Zealand’s South Island shows a huge wall of cloud rolling toward an airport in Ashburton on November 27, 2021
[📹 HD, Austin Jones: buff.ly/3pq0mlN]
2207
Even at an early age baby penguins knows how to form a circle of defense when a predator attacks. One even knows to make himself big and spread his wings. Another bigger penguin comes and saves them, but the courage has been tangible [full video: ow.ly/jcHI30n9XJE]
2208
Eucharitid wasps are as much wonderful in their appearance as terrible as parasites [📷 Rodrigo Layug, read more: bit.ly/2vUca1r]
2209
In Pompeii, some streets have little white stones between the bigger ones and it's very likely this was done to facilitate the nighttime visibility, reflecting moonlight or the oil lamps' brightness [source, read more: buff.ly/3uh90nO]
2210
HoloLamp creates a projected tangible interface on each restaurant table-top, so that each customer can select and view the dishes in full size and 3D, and finally place the order while remaining seated
[video: buff.ly/2pXyCWS]
2211
The Eternal Flame Falls is a small waterfall located in the Shale Creek Preserve, New York. A small grotto at the waterfall's base emits natural gas (~ 1 kg of methane per day), lit to produce a small flame [read more: buff.ly/2kXS6rN] twitter.com/TrisjantoTJ/st…
2212
Unexpected cleaners: black vultures remove debris, ticks, and peck at sores of capybaras, with an overview of tick-removing birds in Brazil
[full paper: buff.ly/3l6PnvL-]
[video by Fernando Perez Piedrabuena: buff.ly/3cMYq0j-]
2213
This is a magnified cross section of a pine needle
[source, Forest Schooling, Nature Learning, Earthschooling: buff.ly/3pQv2Oc]
[read more: buff.ly/3eRDczb]
2214
This clip undoubtedly falls in the category don't try at all (not only at home), but it also visualizes very well the extreme reactivity of sodium with water
[read more: buff.ly/3nYUdNo]
[📹 EatsTooMuchJam: buff.ly/3p30wyY]
2215
How researchers use drones to catch viruses blasted out of whale blowholes to overcome difficulties in sampling
[paper: buff.ly/2Ju0pcZ]
2216
It’s so much a part of our everyday lives that we don’t often think about vitamin C. This image of Vitamin C was taken by Spike Walker using a Zeiss Ultraphot lll microscope to reveal the strange structures that make up this scurvy-fighting substance buff.ly/2qIlgP2
2217
This strange creature was discovered by marine biologists in 2007. Teuthidodrilus, commonly known as the "Squidworm", is just as flamboyant as it is strange in appearance. ROV cameras reveal its highly interesting methods of swimming [full video: buff.ly/2q686Od]
2218
Rubbing a sharpie on a can, close to the tear strip, leads to the can to open. Rubbing causes the alluminum to flex back and forth and therefore to get weaker. Eventually the metal can't hold the pressure anymore and pops [full video by the Physics Girl: buff.ly/2NjWm39]
2219
Alligators move on land by 2 forms of locomotion called "sprawl" (with the belly making contact with the ground) and "high walk" (up-on-four-limbs). This is a high walk used by a big one spotted in Central Florida in 2017 [source: buff.ly/3FWqcUF]
2220
Anothere review of the carved mahogany writing table, said to have been crafted specifically for use by King Carlo Alberto of Sardinia (1798-1849) with a surprising number of unusual secret compartments
[source, m.s.rau_: buff.ly/3gLf9GI]
2221
Helium's the only element on Earth that is a completely nonrenewable resource. It can’t be artificially produced & is formed in natural gas wells as ancient uranium decays, which takes billions of years. That's why the world is constantly running out of it buff.ly/2CxkpWZ
2222
This short, slightly sped up clip, shows an impressively geometric bird's eye view of a synchronised dance sequence taken from Footlight Parade (1933), by director and musical choreographer Busby Berkeley [source and full video: buff.ly/2rJJJHq]
2223
Why golf balls have dimples. It turns out, somewhat counter intuitively, those dimples significantly decrease the drag on the golf ball as it flies through the air, compared to a smooth ball
[read more: ow.ly/iBbo30nMBi4]
2224
172 years ago #Today, the rotation of the Earth was experimentally proved by Leon Foucault. After weeks of work, he recorded in his journal that he made this discovery at 2:00 am working with a pendulum in the cellar of the house he shared with his mother buff.ly/2MEJlUM
2225
Monitoring your health may get a lot easier thanks to this technology developed by a team of researchers in Germany. They created tattoos that change color according to the body’s levels of glucose and albumin or its pH [read more: ow.ly/rZ1m50wvf4U]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links