576
The three ancestral species in the genus Citrus associated with modern Citrus cultivars are the mandarin orange, pomelo, and citron. Almost all of the common commercially important citrus fruits are hybrids involving these three species with each other buff.ly/38nLgDE
577
The Cellular Conveyor (celluveyor) is a unique modular conveying and positioning system. It consists of several small hexagonal conveying cells, each with three individually driven omnidirectional wheels
[read more: buff.ly/2yqu56b]
578
Have you ever wondered how an athlete who competes in the javelin throw trains? This video by athletics.world shows German champion Johannes Vetter at work on a training device
[source: buff.ly/3ADMMA5-]
twitter.com/jack_holroyde/…
579
The glass frog is named for its transparent skin, so that you can see all its internal organs
[read more: buff.ly/2lsDhh7]
[photo, Jaime Culebras: buff.ly/2rhJvHi]
580
The story of the longest duration flight. Between 1958 and 1959, Bob Timm and John Cook remained aloft for a full 64 days, 22 hours and 19 minutes on a Cessna 172, setting a record that stands to this day. In the photo, a refueling operation [read more: buff.ly/2XJqhdN]
581
The balls behind the horizontal lines are all the same color.
This one and many other color illusion by
@NovickProf
are available here: bit.ly/2O74l2I
Explanation of the Munker illusion: engineering.utep.edu/novick/colors/
582
A clever solution for the Escher cube, by Pierpaolo Andraghetti
[source: vimeo.com/120223777]
583
Dr Tatiana Erukhimova from @TAMUPhysAstr explains the intertial potato
[📹 TAMU Physics & Astronomy videos: buff.ly/3Qm5YJ2]
584
This clip by Gelmini Macchine shows a Parmesan cheese cutting line at work
[full video: buff.ly/3H1MOUI]
585
Have you ever seen a 5-story building structure collpase in a volcano? This is the approximate size of the portion of the rim that Hörður Kristleifsson filmed falling in the Fagradalsfjall crater in Iceland
[source, more videos: buff.ly/3PhkIcM]
586
This is possibly one of the most awesome pictures taken on the Moon: Jack Schmitt, (the only scientist who practiced geology on another world), with the US flag and the Earth (plus Gene Cernan reflected in his visor), 50 years ago #Today go.nasa.gov/2iU2AYp #Apollo17
587
While conceived later, this peculiar robot bar also wanted to celebrate the future and in particular the space race. It was designed by Fratelli Borghesani Mobili in direct correlation to the Apollo 11 lunar landing in 1969
[buff.ly/3rRd8KX, buff.ly/34bqWHH]
588
55 years ago #Today, the Concorde, the joint British-French venture and the world's first supersonic airliner, was unveiled in Toulouse, France bit.ly/2kpX8gi
589
111 years ago #Today, in Stockholm, Sweden, Marie Skłodowska Curie became the first person to be awarded a second Nobel prize. She's still the only person awarded with two Nobel prizes in two different branches of science bit.ly/2kn2vfT
590
The Large Hadron Collider is the world’s largest, most powerful particle accelerator: in a way it's the world's largest single machine. It consists of a 27-km ring excavated between the lake of Geneva and the Jura mountain range at an average depth of 100 m. Let's see some facts
591
40 minutes from recently unocovered footage of the detonation of the largest nuclear bomb the world has ever seen, the RDS-220, or Tsar Bomba
[read more, the full video: buff.ly/34GCnp8]
592
The great potoo, or Ghost Bird.
[source, read more: buff.ly/3VOS8SP]
593
This is the dance a male peacock spider performs to attract a female. But he needs to be careful: if the female is not interested, she may attack, kill, and feed on him, and she may also do this after mating
[📹 Michael Doe: buff.ly/3hfSeUl]
594
The king vulture (Sarcoramphus papa) is a large bird found in Central and South America. William Bartram reported a "panted vulture" in his notes of his travels in Florida during the 1770s. It was very likely a king vulture.
[📷 Miroslav Liska: buff.ly/3HqSAT0]
595
Dujiangyan Zhongshuge is a bookstore located in Chengdu, China. Designed by architecture firm X+Living, it's a two-story space which looks like an M.C. Escher-like artwork, thanks to the mirrored ceilings and gleaming black tile floors
[read more: buff.ly/34vqCRP]
596
This is what happens when a cat meets an optical illusion by @AkiyoshiKitaoka
[📹 Squirrel Master/Ryan Kotzin: buff.ly/3ORQziN]
597
A broken sea? It's actually a crack in the ice of lake Baikal, captured by photographer Alexey Trofimov
[source: buff.ly/3KAWrf6]
[author's site: en.trofimov-photo.com]
598
The Blue Java is a hardy, cold tolerant banana cultivar known for its sweet aromatic fruit, which is said to have an ice cream like consistency and flavor reminiscent of vanilla
[read more: ow.ly/SqUn30o6i14]
599
Dubbed as the highway above the clouds, the Tianlongshan Highway is located in Shanxi Province, Northern China. Its elevation gain is 350 m. It’s equivalent to a 116 floor building with a 3-meter story height
[📹and read more: buff.ly/3Holtis]
600
Crows are widely regarded as some of the smartest animals on the planet. In this clip narrated by Sir David Attenborough, a wild crow in Japan is seen dropping nuts at a crosswalk, providing it a safer opportunity to retrieve the food
[full video: buff.ly/31xLEhh]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links