Massimo(@Rainmaker1973)さんの人気ツイート(新しい順)

151
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]
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The blue-footed booby (Sula nebouxii) is a marine bird native to subtropical and tropical regions of the eastern Pacific Ocean. It is easily recognizable by its distinctive bright blue feet [read more: buff.ly/2Gxvibz]
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Watch Delta Robot (right) and compact LR Mate 200iD robot (left) sort and move sets of four batteries with mesmerizing, seemingly-endless rhythm [source: buff.ly/2ZVYkig]
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This is a map of the Atlantic Ocean floor published in 1968 based on a large number of deep ocean soundings compiled by Bruce Heezen and Marie Tharp, painted by Heinrich Berann for National Geographic Magazine [source: ow.ly/lV6s50xCwM5]
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How the radius rotates over the ulna in a human forearm when twisted. [read more: buff.ly/3C92xkx] [📹source: buff.ly/3C8hCTh]
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The story of Dr. Khurshid Guru, who created a nebulizer on an Air Canada flight, using a water bottle, a cup, oxygen, and an adult inhaler to help an asthmatic toddler breath [read more: ow.ly/UVYa30nc83t]
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Fruit farmers' most difficult task is organizing the havest. Tevel's drones select, pick and box only ripe fruits with the help of an AI working day and night [full video: buff.ly/3APys9i]
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The giant Pacific octopus is the largest octopus species, based on a scientific record of a 71-kilogram (157-pound) individual weighed live. Its arm can reach 4 meters in length [read more: buff.ly/3jvX14R] [📹brookesirah: buff.ly/3I9brCd]
159
These are drops of blood, plasma and water bead up when placed on the superhemophobic titanium [source, Colorado State University: buff.ly/2DEJSSp]
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Boxabl folding house is 40 square meters—about the size of a studio apartment—and they’re calling it the Casita. It costs $49,500 and can be set up in a day once it’s delivered [read more: buff.ly/37bRNle]
161
A Tesla valve is a fixed-geometry passive check valve. It allows a fluid to flow preferentially in one direction, without moving parts [read more: buff.ly/2PzsHFf] [📹 NightHawkinLight: buff.ly/2S0yQLZ]
162
These are Brown Marmorated Stink Bug nymphs seen hatching at extreme close up, captured by YT macro-photography channel Another Perspective [full video: buff.ly/3ueKIJL]
163
Is it rotating vertically or horizontally? Clockwise or counterclockwise? This optical illusion created by game developer & artist Frank Force features a moving shape that seemingly shifts each way and won the 2019 contest for the Best Illusion of the Year ow.ly/5jB730q2CJj
164
One radian is the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle. Another way to see that is that a radian is an equilateral triangle, with one side curvilinear [📹 @MathHappensOrg, read more: buff.ly/3iaG4au]
165
Bismuth crystals have a peculiar spiral, stair-stepped structure with silver-pink hue, often with an iridescent oxide tarnish showing many colors from yellow to blue. This is how one can obtain them. [📹 joemyheck: buff.ly/3C7uxoD]
166
In the 1980s the U.S. Army figured that around half of the landmass on the planet was impassable by conventional wheeled or tracked vehicle, so it partnered with Ohio State University to build this: the Adaptive Suspension Vehicle [source, read more: buff.ly/2R7nt3q]
167
The story of Guillaume Le Gentil, the astronomer who spent 8 years of his life on a quest to observe the transit of Venus, during which he was declared legally dead and his wife remarried, only for the sky to end up being cloudy on the day of the transit: buff.ly/3LMPubm
168
Can you figure out which of these orange lines is longer? Not only are they the exact same size, but their tops and bottoms are also directly in line with each other [source: buff.ly/2Kw0I7D] [read more: buff.ly/2KnYvfe]
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This is the first acknowledged picture of M31 or the Andromeda Galaxy, taken exactly 134 years ago #Today by engineer and amateur astronomer Isaac Roberts bit.ly/2hs77xX
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95 years ago #Today, the Krakatoa volcano began a new eruption on the seafloor along the same line as the cones of previous activity. By 26 Jan 1928, a growing cone had reached sea level and formed a small island called Anak Krakatoa (Child of Krakatoa) bit.ly/2zL0CzA
171
This is a newfound species of tardigrade, one of about 1,300 known types of water bears. It was discovered in moss growing on dead tree trunks in Germany’s Black Forest. SEM image, magnified 2,400 times. [📷 Oliver Meckes & Nicole Ottowa: buff.ly/3YTxuCQ]
172
Perhaps no animals have more of a reputation for their playful nature than river otters and this is true in any environment, be it water or snow. This one has been caught using its belly to slide on the snow [📹riley_lethbridge: buff.ly/3WsCgFZ] twitter.com/its_jessi_grac…
173
Melibe viridis is a carnivorous sea slug with a gelatinous vacuum cleaner for a head: the nudibranch has an oral veil expanding into a "fish net" used to scan and eat its prey [read more: bit.ly/2wkkbBv] [📹sina.joelle: buff.ly/3vkJjVh]
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Escher's work is inescapably mathematical. After his 1936 journey to the Alhambra and to La Mezquita, he began to explore the properties of tessellation using geometric grids. This is a gif based on "Smaller and smaller" (1956) to stare at for eternity buff.ly/3YS3qrk
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Unitree Go1 is a new genertion robot dog that can reach a speed of 17 km/h, with adaptive joints and intelligent side follow system. This is a mass testing event in a Unitree factory [read more: buff.ly/3u1QnG5]