376
The Phare du Four, in Brittany, France, was built in 1869. It's automated and no longer guarded since 1993. It's 31 meter high and the waves that break on it can reach that same height
[📹 Mathieu Rivrin: buff.ly/3VaCnph]
377
Bats and dolphins evolved echolocation in the same way (down to the molecular level). An analysis revealed that 200 genes had independently changed in the same way and this is an extreme example of convergent evolution [read more: ow.ly/xkfk30nysHa]
378
This is what a bear looks like without hair. Dolores, a spectacled bear at the Leipzig Zoo in Germany in 2009 had this condition caused by a wrong diet. When the diet was corrected the fur grew back completely within 4 months
ow.ly/vnry30nBZDv
ow.ly/elEY30nBZHc
379
Caracal's ears each have more than 20 muscles that swivel around to detect sounds of their prey. The tufts may enhance sound going into their ears or be used to communicate with other caracals [read more: buff.ly/3pi4O7l] [clip by wildcatcentre: buff.ly/3pjuDny]
380
The black heron hunts with a method called canopy feeding, using its wings like an umbrella, creating shade that attracts fish. This video by @leedsbirder shows one filmed in Gambia [read more: buff.ly/3CzNrld-] [video, HD: vimeo.com/303166907-]
381
Sunflowers are used to assist in clean up after a nuclear disaster. They are hyperaccumulators, capable of absorbing toxic heavy metals from the ground and have been planted at both Chernobyl and Fukushima in the attempt to aid in soil restoration ow.ly/sZ6L50xSyNW
382
The Healesville Sanctuary, Victoria, Australia, is one of only two places to have successfully bred a platypus. The first platypus bred in captivity was born in the Sanctuary in 1943
[📹: buff.ly/3ftlvd0]
[read more: buff.ly/3CnLFqH]
383
Burn an element and it will show its color signature. Each element has an exactly defined line emission spectrum, we are able to identify them by the color of flame they produce
[read more: buff.ly/3vi5z0h]
[📹 Thoisoi: buff.ly/3GtyiXW]
384
This impressive tornado was filmed by Amie Kuxhaus in Martin, Soth Dakota on June 30, 2019
[read more: buff.ly/3d2T1Gi-]
385
Chaos in the double pendulum system is shown and the sensitive dependence on initial conditions of the motion of the double pendulum can also be seen
[source, read more, Wesleyan University Dept. of Physics: buff.ly/34QJihw]
386
The story of 17-year-old Solomon Atimbiri who taught himself robotics and, among the other things, built this toy excavator using scrap materials
[read more: buff.ly/3FKg0jC]
387
Anodizing titanium generates an array of different colors which are dependent on the thickness of the oxide and determined by the anodising voltage
[read more: buff.ly/2Py1DUF]
[📹 buff.ly/3eHdXDa]
388
Porcupines' quills take on various forms, depending on the species, but all are modified hairs coated with thick plates of keratin. This video by Mariette Landman shows what a formidable defense they constitute
[video, HD: buff.ly/3DKOe3y]
389
This is how a Fibonacci spiral is built
[read more: buff.ly/2ozEkeS]
[source of the gif: buff.ly/3mCJZBI]
390
This is a photo taken by DeviantARTist Fallout99 and it shows how refraction can paint a 30-meter loblolly pine forest in a drop of water
[source: bit.ly/2tSoVsI]
391
Believe it or not, thousands of hedgehogs come through the doors of veterinary clinics every year, and around two thirds of them will require an X-ray. This is how it's generally performed
[read more: buff.ly/3SqdKm3]
[📷 Dr. Longissimus]
392
The radula is an anatomical structure that is used by mollusks for feeding, sometimes compared to a tongue
[read more: bit.ly/2haGZKN]
[source, full video: buff.ly/3hNaT7J]
393
The common name "Vietnamese mossy frog" arises from its mottled green and brown skin that resembles moss growing on rock, and it's an effective form of camouflage
[read more: buff.ly/2q2duOO]
[📹: buff.ly/3cO57CZ]
394
This photo shows six unidentified scientists using ladders and a large chalk board to work out equations for satellite orbits at Systems Labs, California. The set of pictures was captured by J. R. Eyerman for Life Magazine in 1957
[more photos: buff.ly/2RSD5sY]
395
Over the course of 3 days scientists pumped 10 tons of cement into an abandoned ant hill. After weeks of digging, the colony’s intricate & impressive structure is revealed. This one
[full video, from "Ants! Natures Secret Power": buff.ly/2ICATyB]
396
The heart of an aircraft's artificial horizon is a gyroscope mounted in a double gimbal, which allows the aircraft to pitch and roll as the gyro stays vertically upright
[read more: buff.ly/3RCVCol]
[📹 aceaviations: buff.ly/3e7gUNv]
397
Defending a castle, the Escher way
[source, Mehdi Alibeygi: buff.ly/3IehyFc]
398
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]
399
This carved mahogany writing table is said to have been crafted specifically for use by King Carlo Alberto of Sardinia (1798-1849). It has a surprising number of unusual secret compartments
[source, m.s.rau_: buff.ly/3sgBLRQ]
400
One of the biggest concentrations of bioluminescence in Marina del Rey, California.
A species of photosynthetic dinoflagellates is the cause of these impressive displays
[read more: buff.ly/3Dp4v1C]
[📹 Patrick Coyne: buff.ly/3RIRhkp]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links