Massimo(@Rainmaker1973)さんの人気ツイート(リツイート順)

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Colugos are arboreal gliding mammals that are native to Southeast Asia. A fur-covered membrane, called a patagium, connects to the face, paws, and tail, giving them an unusual body shape [read more: buff.ly/3hAPkEn] [📹 buff.ly/3Av6f6a]
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How to create a mesmerizing (and scary) well in your living room table using the infinity mirror principle. [what's an infinity mirror: buff.ly/3VErviX] [source: buff.ly/3B0ucU4]
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This short clip shows a 22 million year old termite preserved in amber found in the Dominican Republic. It also presents water trapped inside its cavities [📹 Rocks for the Spirit: buff.ly/3lz4y11]
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How a book written in 1910 could teach you calculus better than several books of today [Calculus Made Easy, by Silvanus P. Thompson, 1910 - full text pdf: bit.ly/2pThkf1 or with the table of contents: calculusmadeeasy.org]
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Nara Park, Japan is home to over 1200 wild sika deer. This clipcaptured by Kazuki Ikeda in March 2020 shows some of them relaxing by cherry blossom trees when the park was closed to tourists due to the pandemic [source, read more: buff.ly/3czFK4L, buff.ly/3m3luf3]
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The 2011 Tōhoku earthquake triggered a tsunami wave that reached heights of up to 40.5 meters. It traveled at 700 km/h (435 mph) and up to 10 km (6 mi) inland. This video shows its devastating speed and power [read more: buff.ly/2vKev0C]
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A 360° camera view from the top of Mt Everest [source: buff.ly/3hEv8a6] twitter.com/LAstrociencia/…
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Madagascar wildlife is so unique that over 90% of it are endemic species that can't be found anywhere else on Earth. Reason for that is that it has been isolated for 88 millions years from other land masses [read more: buff.ly/2JivKM9]
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If a plunging wave is not parallel to the beach, the breaking section (or curl) will move laterally across the face of the wave. This is the "tube" that is so highly sought after by surfers (also called a "barrel", a "pit") [📹 buff.ly/3PpZmKz]
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This video compares the size of tsunamis from the smallest wave to the biggest tsunami [📹 HD, Red Side: buff.ly/3R8UrNA]
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This jaguar demonstrated the meaning of the term power, dragging this 8 ft long, armour plated, 74 toothed, chunk of contracting muscle out of the water. Jaguars are estimated to have the 5th strongest bite in the entire animal kingdom [source: buff.ly/2ubjlH4]
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This now iconic 2014 footage by Aleksander Medveš shows Vali, a bear at the Budapest Zoo, pulling a drowning crow out of the water and then turning his attention back to his lunch of fruits and vegetables [📹 Aleksander Medveš: buff.ly/3NhX4v8]
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«While spacewalking I realized something: I used to think I was scared of heights but now I know I was just scared of gravity» — NASA astronaut Reid Wiseman [source: buff.ly/3ilOqz0]
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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-]
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This site visualizes position and motion of all publicly registered satellites in orbit: celestrak.com
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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 Nicklen: buff.ly/3QJvLf5]
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The number of finger joints on each hand (excluding the thumb) makes it possible to count to 12 by using the thumb. Egyptians and Babylonians were fond of counting in base twelve like this and this is why we have 24 hours in a day & 60 minutes in an hour ow.ly/H8jE30ndX0q
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Cystisoma is a crustacean that lives between 600-1000 m deep in the ocean. Its body is totally transparent: only its eyes are pigmented. This one has a brooding pouch full of orange eggs [read first: buff.ly/3vmJkIj [📹 Alejandro Damian-Serrano]
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The Cistercian numerals are a forgotten number system, developed by the Cistercian monastic order in the early thirteenth century, much more compact than Arabic or Roman numerals: with a single character you could write any integer from 1 to 9999 [more: buff.ly/2LDj1Kg]
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This popular experiment by Youtuber brusspup shows 24hz sine waves in a water flow using a speaker, sound and a 24 fps camera [full video, read more: buff.ly/33orYAe]
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Beauty of Numbers
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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…
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To prevent drying out in the hot sun of the dry season, the giant monkey frog secretes a form of organic ‘sun screen’ and applies it to its body [source, full video, BBC: buff.ly/2lhLK6Q]
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Photographer Toogee Sielsch filmed a badger and coyote strolling together in a forest in South Lake Tahoe, California. They've been spotted together before: buff.ly/3mdYknN-, even hunting: buff.ly/37ZyI4I- [source: buff.ly/2ZlOLKO-]
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Apples are generally red, green, yellow, but if the right geographical conditions are met, they can apparently grow dark purple, almost black, as well. These rare apples are called Black Diamond and they are currently only grown in the mountains of Tibet ow.ly/790C30odBsT