1526
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
1527
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]
1528
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]
1529
#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]
1530
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]
1531
Remarkable vapor cone on a Navy Blue Angels F-18
[read more: buff.ly/2lkUJEo]
[📹 Brandon Bruce: buff.ly/3exEmDw]
1532
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]
1533
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]
1534
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]
1535
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]
1536
This now famous animation by Reddit user theotheredmund beautifully breaks down herd immunity in about 6 seconds [read more: buff.ly/2NSCgeE]
1537
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]
1538
The hallway illusion: cover the middle and you go faster, cover the sides to slow down
[explanation: buff.ly/2IrcrQA]
1539
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
1540
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]
1541
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]
1542
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]
1543
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]
1544
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]
1545
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]
1546
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]
1547
A car-to-car test between a 2015 Nissan Tsuru and a 2016 Nissan Versa. Travelling at 64 km/h the test highlights the significant differences in safety standards between these two baseline models sold by the same manufacturer in different markets [video: buff.ly/2PlxsCg]
1548
Shenzhou 14 astronauts delivered their first lecture from the Tiangong space station
[full video: buff.ly/3ewPOPN]
1549
This is when the US Navy launched trucks (actually weighted sleds) off the USS Gerald Ford aircraft carrier to test its jet catapult system
[source, full story: ow.ly/wDt150l2gMf]
1550
This video uses a live imaging technique to visualize mouse T-cells killing mouse tumor cells. Cells were imaged for over 6 hours at a frequency of 1 image every 20 seconds
[source, read more: buff.ly/2WToyNK]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links