2176
The potato paradox is a mathematical calculation that has a counter-intuitive result.
"You have 100kg of potatoes, which are 99% water by weight. You let them dehydrate until they're 98% water. How much do they weigh now?"
The surprising answer is 50kg
buff.ly/2B5t3xS
2177
Endoxyla cinereus, aka the giant wood moth, is the heaviest moth in the world; weighing up to 30 g. Its wingspan is approximately 23 cm. It is found in Australia (Queensland, New South Wales) and New Zealand
[read more: buff.ly/3igPdU7]
[📷 buff.ly/3Vznbl5]
2178
The best number is 73.
73 is the 21st prime number.
Its mirror (37) is the 12th and its mirror (21) is the product of multiplying 7 and 3.
In binary, 73 is a palindrome, 1001001 which backwards is 1001001
[source: buff.ly/3Vt1jaQ]
2179
Impressive upward lightning captured on August 14, 2022 in Medina, Saudi Arabia
[read more, upward lightning: buff.ly/3OFkHz4]
[📹 Gamal Sayed]
2180
While snorkeling off the coast of Lady Elliot Island, Jacinta Shackleton spotted and filmed a blanket octopus, a pelagic cephalopod with a long, transparent web that connect the dorsal and dorsolateral arms
[source: buff.ly/3faLMcA]
2181
Photographer Yves Villa captured this unusually heart-shaped lightning in Provence, France, on July 31, 2016
[source, more photos: buff.ly/3EO5DfK]
2182
Photoshop 1.0 was released on February 19, 1990, for Macintosh exclusively. This is what it looked like
[read more, video: buff.ly/3gCdmnF]
2183
Sometimes a new species is hiding in plain sight. The Vogelkop Superb Bird-of-Paradise has songs, dances and courtship appearances that are very distinct from its relative the Greater Superb Bird-of-Paradise
[Cornell Lab of Ornithology: buff.ly/2HOPjyl]
2184
An interesting take on tensegrity where one heavy wire frame seems mysteriously suspended above another. This configuration is related to the concept of tensegrity invented by Kenneth Snelson and made famous by the architect Buckminster Fuller in 1949 buff.ly/349NSm6
2185
This green heron learned to fish with a piece of bread as a bait
[read more: bit.ly/2uQrH3h]
[full video: buff.ly/32t5lFC]
2186
This is the preserved shell of a giant 'ancient armadillo' creature called Glyptodont that roamed the earth around 20,000 years ago. A farmer in Argentina uncovered four of them in a dried-out riverbed near Buenos Aires in February 2020 [read more: ow.ly/cifl50B0cTo]
2187
Migaloo is perhaps the most famous humpback whale in the world. His distinctive absence of pigmentation due to albinism allows people to easily identify him and report sightings. First spotted in 1991 off Byron Bay, Queensland, he's periodically observed buff.ly/3gKNinT
2188
Photographer Mark Cowan was travelling through the Amazon studying reptile and amphibian diversity when he stumbled upon an unusual sight… A caiman wearing a crown of butterflies, which documents lachryphagy buff.ly/2LM9A9G [source of the photo: buff.ly/35vimPD]
2189
These are the unusual ice patterns that wildlife photographer Karl Ramsdell captured with a drone in Mirror lake, New Hampshire. This might be caused by heat rising from the water below
[read more: buff.ly/2QH7s4V]
[source, more photos: buff.ly/3fbmew6]
2190
In the 1920s newly hired engineers at General Electric would be told, as a joke, to develop a frosted lightbulb. The experienced engineers believed this to be impossible: newly hired Marvin Pipkin got the assignment not realizing it was a joke & succeeded ow.ly/yRr730nXnkp
2191
Leptocephalus is the flat and transparent larva of the eel, marine eels, and other members Elopomorpha, the most diverse groups of teleosts, containing 801 species [read more: buff.ly/3F7du7N] [source, HRF U/W Production: buff.ly/3GluGoj]
2192
Parahawking is an activity that combines paragliding with falconry. Birds of prey are trained to fly with paragliders, guiding them to thermals. This is a black vulture
[read more: buff.ly/2FFNIGy]
[📹 Uru_Fly: buff.ly/3UiJgTD]
2193
A parietal eye, also known as third eye or pineal eye, is a part of the epithalamus present in some vertebrates. Located at the top of the head, it's photoreceptive, regulates circadian rhythmicity and hormone production for thermoregulation [read more: buff.ly/3tdTKtO]
2194
The Amazon river dolphin acquires a pink color, giving it its nickname "pink river dolphin". It is believed that its color depends on the temperature, water transparency, and geographical location
[read more: buff.ly/2AYlNUD]
[📷Michel Watson: buff.ly/3GS91aA]
2195
Koalas, cute marsupials that climb trees with babies on their backs, have fingerprints that are almost identical to human ones. Not even careful analysis under a microscope can easily distinguish the loopy, whirling ridges on koalas' fingers from our own ow.ly/6L4430nWpKm
2196
Designed by The Archimeded ‘LIAM F1 UWT is a new generation of wind turbine for domestic use capable of generating an average of 1,500 kilowatt-hours of energy with a wind speed of 5 m/s—enough for a family home
[read more: buff.ly/3OFPhJ8]
2197
The lyrebird of the genus Menura can imitate the calls of at least 20 species of birds and more interestingly, other sounds it hears. David Attenborough shows one imitating a variety of unexpected sounds
[full video, BBC Earth: buff.ly/32Qrehn]
2198
You can make a phonograph with a piece of paper and a needle
[more detailed video DIY: buff.ly/3XH3JEA]
2199
Magnetically assisted gears work with no mechanical contact. The input shaft never touches the output shaft unless the gear box is overloaded
[video: buff.ly/3e8dqHB]
[read more: buff.ly/3vBVbQQ]
2200
The Japanese technique called Daisugi, enables foresters to grow more wood using less land and consists in heavy pruning of a mother cedar tree, which encourages tall, thin saplings to shoot upwards. In other words, think of it as a bonsai on a large scale ow.ly/ukzy50B0MO5
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links