1001
How Eratosthenes measured the size of Earth: the Cosmos episode where Carl Sagan explains how the ancient Greeks, using reason & math, figured out the Earth isn’t flat over 2,000 years ago
[📹 buff.ly/3h8nmRo]
[transcript: bit.ly/2C15z8A]
1002
These excerpts from a 1980 documentary about Czech animator Karel Zeman show how some of Karel’s special effects were achieved in the movies he made between 1947 and 1980
[full video + read more: buff.ly/3LAKWnn]
1003
Tamas Kalman owns and operates Octopus Kites, an online store that sells giant high-quality handmade, yes, octopus kites. Each kite is 15 meters long and amazing to watch
[read more: buff.ly/2LvOdX2]
[source of the gif: buff.ly/3dtEErW]
1004
Vacuum excavations overcome damage to buried pipes and cables. As well as guaranteeing consistently high suction performance and low maintenance, putting a stop to high cost and inefficient manual excavation [source, bforceAU: buff.ly/2TYt6Vj]
1005
The story of Jay, the rooster that killed the hawk which attacked its hen house
[source + video: buff.ly/3WP6jYj]
1006
The kea is a large parrot found in the South Island of New Zealand. It has mostly olive-green plumage with orange feathers on the undersides of its wings, but some of the outer wing are dull-blue
[read more: buff.ly/2M5bkIy]
[📷Élise Fournier: buff.ly/2NERTr7]
1007
The Guoliang Tunnel (Chinese: 郭亮洞) is carved along the side of and through a mountain in China. The tunnel links the village of Guoliang to the outside through the Taihang Mountains
[read more: buff.ly/2AMFT0Y]
[source of the gif: buff.ly/3LaZWd1]
1008
The blue whale, at up to 29.9 metres (98 ft) in length and with a maximum recorded weight of 173 tons, it is the largest animal known to have ever existed. This picture, part of a footage captured in California, gives the scale of a blue whale ow.ly/gCRa30n7yjd
1009
Dinosaurs were big and some prehistoric animals were huge, but the blue whale is not only the largest animal in existence, it is also the largest known animal to have ever existed
[read more: buff.ly/2qPcZbf]
[source of the image and credits: buff.ly/2HAG2K2]
1010
Gannets can dive from a height of 30 m (100 ft), achieving speeds of 100 km/h (60 mph) as they strike the water
[read more: buff.ly/339A2UV]
[📹 Lisa Button, captured in 2020 in Newfoundland, Canada: buff.ly/33kzfAV]
1011
«I believe that scientific knowledge has fractal properties, that no matter how much we learn, whatever is left, however small it may seem, is just as infinitely complex as the whole was to start with» -- Isaac Asimov buff.ly/3dvByR8
1012
The coloration of the Monet’s Pond in Seki city, Japan, is so profound you may think there's some artificial lighting or dye behind it. But amazingly, there are no visual effects whatsoever
[📹 Hidenobu Suzuki: buff.ly/3TdNI6G]
1013
This clip is a brilliant example of how play is totally shared by great apes and humans: not only gorillas and other primates play, but they do it just like us
[read more: buff.ly/3fI0vw1]
[📹 buff.ly/3Fy2i4n]
1014
«Fun to imagine» is a 1983 BBC TV series originally shot on 16mm film at Richard Feynman's house in Altadena, California. He explains that trees actually come from the air and why the heat from a fire is in fact the heat of the Sun: buff.ly/3SQ0uZm
1015
Watch how fellow bees clean honey off another bee that fell into the honey extractor and was saved by the beekeeper, before it suffocates
[📹 + read more: buff.ly/3Qy1UWt]
1016
There's a math TV show in Nigeria
Created by Cowbell in 2015, it's aimed at promoting mathematics by being deployed in public and private schools.
[read more: buff.ly/3zQY3ga]
twitter.com/Osmpeoples/sta…
1017
That's how a wooden chess piece is made
[video: buff.ly/3Ggq4SX]
1018
On October 9, 1903, a NY Times editorial followed the ignominious failure of a government-sponsored flying machine, commenting that ""Man won't fly for a million years". The Wright Brothers made their first powered flight 9 weeks later
[full article: buff.ly/3hRZYK5]
1019
Graphical concept of the definition of sine and cosine
[read more: ow.ly/d0vF30nrQay]
[source, Awesomath: ow.ly/WLGP30nrQb5]
1020
This baby zebra was born with spots instead of the species’ signature stripes. Wildlife photographer Abdelrahman Hassanein took a video of Tira, who has a genetic condition known as “pseudomelanism,” which causes abnormalities in zebra stripe patterns: buff.ly/2oP6S9M
1021
This short clip shows how light behaves when beamed through several shaped lenses.
Try this online simulator by the University of Colorado: buff.ly/3p7h3mL]
[video: buff.ly/3CRIw2x]
1022
Disney's invention of the multiplane camera was a groundbreaking achievement in film, enhancing the feeling of depth in traditional animation. This clip shows the difference between a classic zoom vs a multiplane camera one [video: buff.ly/3dv2Qwo]
1023
In 1988 the U.S. government wanted to know how strong reinforced concrete is, the very same stuff used in construction of nuclear reactor facilities, So they launched an F4 Phantom jet at 500 mph and slammed it head-on directly into a slab of concrete buff.ly/3vK1Fzj
1024
Laser ablation or photoablation is the process of removing material from a surface by irradiating it with a laser beam: rust removal from iron objects is especially efficient: buff.ly/3H7BVkq. But safety eyewear should be always used [source: buff.ly/3BZRfMu]
1025
Diamond Head is a volcanic tuff cone on the Hawaiian island of Oʻahu. It was created by the eruptions from the Koʻolau Volcano and is estimated to be about 400,000 to 500,000 years old.
[read more: buff.ly/2WxL537]
[📹 buff.ly/3hu7ZY1]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links