451
This article was published on April 18, 1963.
The feature in the News-Journal, a newspaper out of Mansfield, Ohio tells us the concept of a cellphone existed long before you held one in your hand
[read more on Snopes.com: buff.ly/3wH1Olg]
452
Despite it looks like a clumsy attempt to draw a snake, Eryx jayakari, known commonly as the Arabian sand boa, is a real species of snake endemic to the Arabian Peninsula and Iran where it spends the day buried in the sand [read more: buff.ly/3QN8B7l]
453
An incredibly rare black deer spotted in the forest of the Barycz Valley, Poland in 2021. Most estimates guess that only about 1 in every 500,000 deer is melanistic
[read more: buff.ly/3R326gl]
[📹 Jakub Wencek: buff.ly/3Kd6AyZ]
454
An immense fever of rays. These large groups can reach up to 10,000 individuals. They come together for breeding and migration, swimming to feeding grounds each year
[read more: buff.ly/3Afp9xL]
[📹 Paul Nicken: buff.ly/3QJvLf5]
455
This 1895 painting is called "Mental arithmetic. In the Folk School of S. A. Rachinskiy". On the blackboard there is an arithmetic problem: (10²+11²+12²+13²+14²)/365, whose solution is 2. This is how the so called Rachinskiy sequence can easily solve it: ow.ly/LGaq30n81LN
456
Einstein's General Relativity field equations are quite complex, but sometimes single ideas can simply summarize entire theories, like John Archibald Wheeler did with his sentence "spacetime tells matter how to move; matter tells spacetime how to curve" ow.ly/vW4u30n6yga
457
The Gyro-X two-wheeled car from 1967 was balanced by the whirling, beachball-sized gyroscope tucked under its hood [full video: buff.ly/3AfqZyS-]
458
Sometimes simple tools make sophisticated technologies look pleonastic: this is how you can smoothly display different materials in interior design without 3D rendering [source: buff.ly/3wepL4p]
459
A massive single "tomato tree" growing inside the Walt Disney World Resort's experimental greenhouses in Lake Buena Vista, Florida has been recognized as a Guinness World Record Holder, with a harvest of more than 32,000 tomatoes & a total weight of 522 kg buff.ly/301GASp
460
A hand warmer generally contains a supersaturated solution of sodium acetate which releases heat upon crystallization when a nucleation center is formed by pressing on the metal disc [read more: buff.ly/3CUHm3R] [source: buff.ly/3BP1UJN]
461
Airless tires, non-pneumatic tires (NPT), or flat-free tires are tires that are not supported by air pressure. This is the Michelin model buff.ly/30fgriO [video: buff.ly/2YaWK9b]
462
How much of Jupiter's moon Europa is made of water? A lot, actually. Based on the Galileo probe data acquired from 1995 to 2003, Europa possesses a volume 2-3 times the volume of water in Earth's oceans [source, read more: buff.ly/2pRbXLn]
463
This snowboard with LEDs changes light patterns when you perform certain tricks or movements, detecting its orientation [video: ow.ly/IutE30n71MB]
464
Technically, the Standard Model can be written in several different formulations, but, despite appearances, the Lagrangian is one of the easiest and most compact ways of presenting the theory [read more: buff.ly/2p3zCKU]
465
Inspired by glaciologist Megan Thompson-Munson, Joshua Tauberer made this iceberg simulator, where you can quickly sketch an iceberg and see how it will float [Iceberger: buff.ly/3qPLnjS]
466
You may not know that the derivatives of the position vector (x) with respect to time have interesting names:
Velocity (v) = dx/dt
Acceleration (a) = d²x/dt²
Jerk (j) = d³x/dt³
Snap (s) = d⁴x/dt⁴
Crackle (c) = d⁵x/dt⁵
Pop (p) = d⁶x/dt⁶
[source: buff.ly/3bLn29h]
467
Devil's Tower is likely an igneous intrusion, formed underground from molten rock that pushed up into sedimentary rock and became solid ~50 million years ago [read more: buff.ly/3bODCow-] [clip by IG's Quin Schrock: buff.ly/2ZYljKS-]
468
A visualization of the lowest density of ice vs water. When a huge, mainly submerged mass of ice detach from an iceberg, the surfacing action can create temporary but very impressive pillars of ice [full video, YT channel Skeater: buff.ly/2ARkrLO-]
469
Before clocks, there were candle clocks, that when burned, effectively indicated the passage of periods of time especailly indoor & at night. To set an alarm, you pushed a nail into the desired point and the nail would ld fall and clank on the metal holder buff.ly/2GevGQi
470
Tumbleweeds start out as tiny seedlings; by summer the plant has a round shape. They grow flowers and fruits. By fall they dry and detach from their roots, so they spread their seeds
[source: buff.ly/3PEUYWt-]
[video: buff.ly/3GYXgwE-]
471
In 2009, Bill Gates acquired the rights to make a series of lectures held by Richard Feynman available to the public. Gates saw the lectures when he was younger so he created Project Tuva to share 1964's The Character of Physical Law. Still available now: buff.ly/3qd2RcB
472
An unusual scene in the wild: a tiger approaches a pool for an afternoon dip, but it carefully checks the depth of the water before relaxing [source, full video, National Geographic: ow.ly/EhGw30n8w8m]
473
Why is speed at sea measured in knots? From the 15th century, sailors tossed a log attached to a rope with knots tied in it at equal intervals. They would count the number of knots that were pulled off the reel in a given amount of time [read more: buff.ly/3mMc8WZ]
474
90 years ago #Today, Amelia Earhart became the first woman to fly non-stop across the United States ubm.io/2wBNM9G
475
Dinosaur tracks from 113 million years ago have been revealed in Texas after a severe drought dried up a river. The footprints - left by a single acrocanthosaurus - had not been seen for more than 20 years [read more: buff.ly/3Am9Ovj]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links