201
UV light is absorbed by the sodalite mineral, which then re-emits radiation at a longer wavelength – and it turns to a golden, lava-like color
[read more: buff.ly/3YVenbM]
[📹wild_nrocks: buff.ly/32zf6E1]
202
Archerfish shoot their prey down with water droplets from their mouths. They are remarkably accurate and can bring down insects and other small animals up to 3 m above the water's surface
[📹 buff.ly/3RfpGqz]
[read more: buff.ly/3Kn98uh]
203
A candle snuffer is a clever and extremely simple mechanical device that can automatically extinguish a candle at a certain time or in case one forgets to blow it out. This is a 1841 model
[📹 Rescue & Restore Shorts: buff.ly/3jyIKoc]
twitter.com/ronin19217435/…
204
Of the many structures Leonardo da Vinci designed, perhaps none made more ingenious use of materials than his practical design for an easy-to-assemble, self-supporting bridge
[read more: buff.ly/3PUNnEY]
[📹 buff.ly/3AnBwrM]
205
Every 4 to 10 years, certain oak populations will synchronize to produce almost no acorns at all (starving off mammals), only to rain them down excessively the following year. This happens because only one in 10,000 acorns results in an eventual tree buff.ly/3oIHlK5
206
Those who hadn’t left the city in time during the 79CE eruption, were trapped in their homes, buried by a shower of pumice stones and lapilli
During the excavations in Pompeii, the remains of over one thousand victims have been found.
[read more: buff.ly/3VtqWYJ]
207
The total area of solar panels it would take to power the world, Europe, and Germany. This map is from Nadine May’s thesis
[source, read first: ow.ly/ga7Z50xBrRU]
208
A rainbow is an optical illuson, it's not an object & cannot be physically approached. Even if an observer sees another observer who seems "at the end of" a rainbow, the second observer will see a different rainbow-farther off
[📹 buff.ly/3I2Q1GQ]
209
Fish can use jellyfish as a suit of armor and general protection from predators, as we can see in this footage captured by Brent Collins while snorkeling along Double Reef on Guam in 2013
[source: ow.ly/q3CV50xAUQC]
210
An accessory cloud can often be seen just above Mount Teide’s summit. Such cloud formations are always attention-getting, such as this lenticular cloud captured by Bartosz Wojczyński, staying in the same spot for hours [full video: buff.ly/35BSa98]
211
These silky sheets are actually a spider web. As happened in 2021 in Australia, sometimes there are so many spiders making webs the silk becomes like one gossamer blanket
[read more: buff.ly/2UDXx4q]
[📹Carolyn Crossley: buff.ly/3kdIybk]
212
This is what happens when a tree branch falls on a 150 kV power line
[source, wickedinsight: buff.ly/2NeMyWJ]
213
This popular experiment by Youtuber brusspup shows 24hz sine waves in a water flow using a speaker, sound and a 24 fps camera
[full video, read more: buff.ly/33orYAe]
214
Kinetic artist Reuben Margolin creates kinetic sculptures that seek to combine the sensuousness of nature with the logic of math. This is a mechanical caterpillar with charriot
[full video: buff.ly/3GSkD9F]
[site: reubenmargolin.com]
215
Some rabbits breeds adapted to live in wet environments, and regularly swim in their day-to-day lives. Domesticated rabbits also are able to swim, but not all of them might like it
[read more: buff.ly/3gNq0N5]
[📹 buff.ly/3BnSGFE]
216
191 years ago #Today, the HMS Beagle set sail from Plymouth: Charles Darwin was 22 bit.ly/2iBI24q #science #explore
217
Born 451 years ago #Today, Johannes Kepler was a key figure in the 17th century scientific revolution. He is best known for his laws of planetary motion which provided one of the foundations for Newton's theory of gravitation bit.ly/22Ujdnc [gif: ow.ly/g6dC30n741x]
218
Born 200 years ago #Today, Louis Pasteur is renowned for his discoveries of the principles of vaccination, microbial fermentation, and pasteurization. His works are credited to saving millions of lives thanks to the vaccines for rabies and anthrax buff.ly/2QePXbq
219
An unusual scene in the wild: a tiger approaches a pool for an afternoon dip, but it carefully checks the depth of the water before relaxing
[full video, National Geographic: ow.ly/EhGw30n8w8m]
220
The Philippine eagle is considered the largest of the extant eagles in the world in terms of length and wing surface. Being a critically endangered species, killing a Philippine eagle is punishable under Philippine law up to 12 years in prison [read more: buff.ly/2lKrawh]
221
The lowland nyala or simply nyala, is a spiral-horned antelope native to southern Africa. As a herbivore, the nyala feeds upon foliage, fruits and grasses, with sufficient fresh water. A shy animal, it prefers water holes rather than open spaces buff.ly/347t7ZH
222
An excellent example of how air pumped into sand, turns sand into a liquid-like substance
[full video with explanation by Mark Rober: buff.ly/2IJ6QUM]
223
In the Arctic circle, ducks take advantage of permanent holes in the sea ice, fighting the fierce ocean currents to dive 10 meters down and reach the rich layer of mussels that populate the sea floor. Some ducks can dive as deep as 60 meters to forage buff.ly/2PWRKRB
224
One of the most realistic, highest-resolution 3D simulation of star formation to date developed by Northwestern University. STARFORGE simulates an entire gas cloud where stars are born
[video by Mike Grudić: buff.ly/3f11JTp]
225
Cube watermelons were intended to fit more compactly in fridges and be able to be cut more easily (without rolling). They were invented by graphic designer Tomoyuki Ono in 1978 by growing them into boxes and taking the shape of the container
[video: buff.ly/3i1OeCd]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links