1576
𝗠𝘆𝘁𝗵: Lightning never strikes in one place twice.
𝗙𝗮𝗰𝘁: lightning can, and often does, strike the same place repeatedly—especially if it’s a tall and isolated object, like a tree
[source, NOAA: buff.ly/3xIkbHM]
[📹 buff.ly/3ezJLKg]
1577
Dr Tatiana Erukhimova from TAMU Physics explains the basic principle of a gyroscope using the classic bike spinning wheel and a rope
[read more: buff.ly/3Thf1g8]
[📹 TAMU Physics & Astronomy videos: buff.ly/3Qm5YJ2]
1578
The solvent based paint removers work by breaking the bond between the object and the paint, swelling the paint and weakening the adhesion to the surface. Historically, they used dichloromethane, banned by EU in 2010
[read more: buff.ly/3SX9ECR]
1579
A camera lucida is an optical device used as a drawing aid by artists and microscopists. It performs an optical superimposition and the artist sees both, scene and drawing surface simultaneously
[📹 Mathieu Stern: buff.ly/3rUCGqW]
1580
In 2019, a team of researchers from the University of Maine revealed the largest 3D printed part in the world (in a single piece): a boat, the 3Dirigo, 7.62 meters long, with a weight of 2.2 tons [read more: buff.ly/2PBx6b9]
1581
It is not uncommon for numerous waterspouts to occur simultaneously, as happened in Koh Mak island, Thailand, in November 2018, with four waterspouts forming at the same time
[📹 Kim Puyu: buff.ly/3rUGdFI]
1582
The frilled shark is considered a living fossil, because of its primitive, anguilliform (eel-like) physical traits. It can reach 2 meters in length and commonly lives at depths of 50–200 m (160–660 ft)
[source, read more: buff.ly/3RXXus8]
1583
Have you ever wondered about how the night sky looked to Vincent Van Gogh when he painted ‘Starry Night'? This is an homage to the artist by Alex Ruiz, but also a somewhat plausible view of the light pollution free sky of 1889 near Saint-Rémy-de-Provence buff.ly/2Ky2oJW
1584
The hallway illusion: cover the middle and you go faster, cover the sides to slow down
[explanation: buff.ly/2IrcrQA]
1585
An excellent climber, the Alpine Ibex's preferred habitat is the rocky region along the snow line above alpine forests, where it occupies steep, rough terrain at elevations of 1,800 to 3,300 metres buff.ly/2IbqLR5 [source, Vittorio Morletto: buff.ly/2KVHIg5]
1586
This now famous animation by Reddit user theotheredmund beautifully breaks down herd immunity in about 6 seconds [read more: buff.ly/2NSCgeE]
1587
Haid Al-Jazil is a 500 year old village in Yemen that sits on top of a huge rock with vertical sides among one of the harshest environment in the world [read more: buff.ly/3mnl4Bz]
1588
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]
[source: buff.ly/3tad5Ki]
1589
Hummingbirds stay in the nest for 18-22 days. The mother feeds her nestlings on small arthropods and nectar by inserting her bill into their open mouth, regurgitating the food into its crop
[full video: buff.ly/32e4vAS]
1590
Smart-X conductive thread visualizes how we are all connected with Connecting Thoughts, a promotional video for Japanese infrastructure company Kandenko
[video, HD: buff.ly/3Vv3zze]
1591
Remarkable vapor cone on a Navy Blue Angels F-18
[read more: buff.ly/2lkUJEo]
[📹 Brandon Bruce: buff.ly/3exEmDw]
1592
The story of the ingenious cheating system involving pens used by a law student at the University of Malaga, Spain and of the amazingly carved BIC pens later confiscated
[full story: buff.ly/3evcBvw]
[📷 Yolanda De Lucchi: buff.ly/3yFyhfa]
1593
#Today in 1843, the theory of quaternions was born when a sudden thought came to William Rowan Hamilton as he was walking with his wife along the Royal Canal in Dublin, Ireland. It was the fundamental formula:
i² = j² = k² = ikj = -1
[read more: buff.ly/3pndnxN]
1594
A bolas spider is any of several species of orb-weaver spider that, instead of spinning the typical web, hunt by using a sticky 'capture blob' of silk on the end of a line, known as a 'bolas'
[read more: buff.ly/33ZZfwm]
[full video, BBC: buff.ly/3g96368]
1595
Persistence hunting is a technique in which hunters use a combination of running, walking, and tracking to pursue prey until it is exhausted. This video shows how trained monkeys can be used for that purpose
[read more: buff.ly/2L4hvfp]
[📹 buff.ly/2L6GS06]
1596
The Netherlands is a leader when it comes to food production due to innovations in agricultural techniques which improve efficiency. Growing a kg of tomatoes in the Netherlands uses 9.1 liters of water. The global average is over 210 liters of water per kg ow.ly/fGQn30nEJYM
1597
The ocean sunfish (Mola mola) is one of the heaviest known bony fishes in the world. Adults typically weigh between 247 and 1,000 kg (545–2,205 lb). Yet, Newly hatched sunfish larvae are only 2.5 mm (3⁄32 in) long and weigh less than one gram [read more: ow.ly/ibW050AGZbW]
1598
Salar de Uyuni is the world's largest salt flat. Following rain, a thin layer of dead calm water transforms the flat into the world's largest mirror, 129 km across
[read more: buff.ly/37Ugxma]
1599
This remarkable long exposure capture by fine art photographer Amery Carlson, contains a dramatic lightning storm off the coast of Ventura, California (officially the City of San Buenaventura) in 2013 [source: buff.ly/2Gt4Sa9]
1600
12 people become 13 people. Where does the extra man come from?
[source and explanation: buff.ly/2rOXeCl]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links