2101
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]
2102
This simple experiment shows the importance of pressure in siphoning. The middle bottle is capped and the air inside it takes space: that's why the fluid level cannot increase until the cap is removed
[source: buff.ly/3gyawzS]
2103
«It doesn’t make any difference how beautiful your guess is, it doesn’t matter how smart you are who made the guess, or what his name is … If it disagrees with experiment, it’s wrong»
— Richard Feynman
[source: buff.ly/3VnufRx]
2104
This typewriter AEG Mignon n. 4 was built in 1925. It's a very compact pointer typewriter with interchangeable type cylinder and keyboard: more than 36 different fonts were available
[full video by grvene: buff.ly/2QEaCsO]
2105
The story of Werner Forssmann, the man who put himself under local anesthesia and inserted a catheter into a vein of his arm and up into his heart without knowing the consequences. He devised the cardiac catheterization and won the Nobel Prize [read more: buff.ly/3qVzaf3]
2106
Kurt Gödel, who was one of Albert Einstein's best friends in his later years, found a solution to general theory of relativity that modelled a strange, unusual and rotating universe allowing for backward time travel
[the Gödel metric: buff.ly/3E4m7Or]
2107
The Great Pyramid of Giza used to look very different from the way it does now. When it was first completed, its external walls of limestone were sanded smooth to shine bright white and it had a golden cap
[video: buff.ly/2A9060G]
[read more: buff.ly/334VWDg]
2108
For more than 20 years, Christian Moullec has flown with birds. With his microlight aircraft he guides migrating flocks of vulnerable species and orphaned birds
[video, read more, National Geographic: buff.ly/3CfBHoY]
2109
How many stars we can see in the night sky with the naked eye (Andromeda galaxy excluded)? About 9,096, or 0.000004 of all the stars in the Milky Way, approximately contained in that yellow circle
[read more: buff.ly/33VEEMK]
[image: buff.ly/30UnCNm]
2110
explainpaper.com allows you to upload any academic paper, highlight a text which results confusing to you and get a clear explanation. Bonus: you can ask follow up questions if you need a more in-depth answer
2111
This experiment was performed in space. Although it looks like a planetary system (a droplet of water orbiting a needle), the physics is a little different, because it's the effect of static electric forces, rather than gravitational pull
[read more: buff.ly/1sC7QSJ]
2112
The Penrose triangle, is an impossible object, an optical illusion consisting of an object which can be depicted in a perspective drawing, but cannot exist in reality
[read more: buff.ly/2SBILXI]
[📹 Satsuki_8198, YT: buff.ly/3AK13w9 ]
2113
Air-to-Air refuelling of two Royal Australian Air Force's F/A-18 Hornets from a KC-30A Multi-Role Tanker Transport aircraft
[full video, HD: buff.ly/3i9MLyH]
2114
‘Wallace’s giant bee’ is the world’s largest bee, about the size of a human thumb. Thought to be exctint since 1981, a team of scientists rediscovered it in the Indonesian forests on North Molucca in January 2019
[📹, Clay Bolt: buff.ly/3OOc1H3]
2115
One of the most unusual breeds of pigeon is the "frillback" pigeon, which has curly feathers, giving it the appearance of a curly-haired bird
[read more: buff.ly/2LiLmQE]
2116
Dynamic projection mapping onto deforming non-rigid surface can be based on two original technologies: high-speed projection "DynaFlash" and high-speed non-rigid surface tracking at 1,000 fps
[source, full video: buff.ly/2sGeudt]
2117
Familiar fruits and veggies like watermelon or corn didn't always look and taste this way. From bananas to eggplant, here are some of the foods that looked totally different before humans first started growing them for food
[source, read more: ow.ly/uCVi50xgrSj]
2118
Allopreening is the mutual preening between two or more birds, practiced to reduce instinctive aggression when birds are in close contact. During breeding, allopreening helps strengthen the social bonds
[📹 Hardik Rathod: buff.ly/3XAetVh]
2119
Difference between AM and FM radio in how it sends its radio signal
[read more: buff.ly/2t1BLpV]
2120
This data visualization by @nicolaraluk shows the occurrence of earthquakes on Earth between July 2017 and July 2018, but differently from other charts, this ones shows them with their depth. Here you can find the interactive version: buff.ly/2qtZ9yn
2121
Fun fact: Apollo 13, the so called NASA's "successful failure", passed the far side of the Moon at an altitude of 254 km above the lunar surface, and 400,171 km from Earth, a spaceflight record marking the farthest humans have ever traveled from Earth: buff.ly/3zFerjk
2122
Malachite is a copper carbonate hydroxide mineral, with the formula Cu₂CO₃(OH)₂. It crystallizes in the monoclinic system and most often forms botryoidal, fibrous, or stalagmitic masses
[📹@rocksforthe spirit: buff.ly/3F2MNB6]
twitter.com/Limportant_fr/…
2123
Instagam's Taitan21 mainly takes pictures of the scenery of Mt. Fuji around Fuji City and Fujinomiya City every day. This is a majestic view of Mt. Fuji surmounted by lenticular clouds while reflected in a lake [source, more pictures: buff.ly/3RNAzkv]
2124
Inspired by a long tradition of impossible objects, this 'impossible portal' created by coded loop artist @jn3008 challanges your mind leaning toward you or away from you according to the point of the portal you focus on [site: jn3008.com]
2125
Often referred to as the jelly bean universe, this jar displays the overwhelming amount of dark matter versus ordinary matter in the universe. The universe is estimated to consist of up to 95.1% dark matter/dark energy with 4.9% coming from ordinary matter ow.ly/HUC850xflVA
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links