251
The Shibuya Crossing in Tokio is frequently called "the busiest pedestrian intersection in the world". A flow measurement survey estimated up to 390,000 pedestrians per day
[source: buff.ly/3U8mpu9]
[read more: buff.ly/3VoXP9k]
252
"Confusing perspective"
[📹 Larry Carlson: buff.ly/3qaubXW]
253
Bridge building has been one of the tests for second year University of Canterbury civil engineering students in Christchurch for nearly 30 years. Graduates have to build a bridge that supports 2 people, but collapses with 3
[📹: buff.ly/3Hj2F4n]
254
Prosthesis is called 'the anti-robot' because it has no automation and is 100% controlled by the person inside via the exoskeletal interface. This is why it is what is known as a mech, not a robot
{learn more, exosapientech: buff.ly/3SzAMrh]
255
After working as a kite maker for over 30 years, Feng Tsan Huang of Taiwan has created his masterpiece: the bike kite. It's 2 meters tall and weighs just 0.8 kg, thanks to carbon fiber beam and polyester panels [source: buff.ly/2JUFvkx]
256
It never gets old. When a helicopter's propeller is perfectly synced with the camera frame rate, the result is always astounding
[why it happens: buff.ly/34ZNsl5]
[source: buff.ly/3tad5Ki]
257
Shoebill stork are normally silent, but they sometimes perform bill-clattering displays by clapping the upper & lower jaws, producing a loud hollow sound like a machine gun, or tribal drums beating
[source, Matsue Vogel Park: buff.ly/3fFVbtI]
258
My infection is still under investigation/therapy. My sister is about to be discharged: I’m thankful for the time spent together. She’s my twin, my new mom & even a daughter, to me, now. Thanks for your loving tweets. While still here in hospital, I’ll slowly restart this account
259
The motion of the hip joint.
The hip ligaments are the strongest in the human body. The Y-shaped and twisted iliofemoral ligament has a tensile strength of 350 kg
[read more: buff.ly/3TcHxQv]
[📹 Anatomy Standard: buff.ly/3TaJJrE]
260
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]
261
After months of chasing starlings, photographer James Crombie captured this remarkable shot of the flock as it swelled into an enormous bird-like murmuration
[read more, author's site: inpho.ie]
262
Matt Baker creates helpful visual guides that condense thousands of years of history. His poster Evolution of the Alphabet looks at nearly 3,800 years of the alphabet’s evolution, tracing it from Egyptian hieroglyphs to the present forms we use today buff.ly/3LRadLN
263
Volcanic lightning is always impressive to see, but it's not just an awesome photographic subject. It could also yield clues about the Earth’s geological past. This picture was taken by Takehito Miyatake during an eruption of sakurajima volcano in 2014 buff.ly/2POMMGg
264
Scientists believe that the function of zebras' stripes are to deter insects, so a team of researchers painted black and white stripes on cows. They found that it reduced the number of biting flies landing on the cows by more than 50% [full paper: buff.ly/2Iwp6nj]
265
There are 12 black dots at intersections in this image. Your brain won’t let you see them all at once. Here's why [read more: bit.ly/2qxnuj5]
266
This is a 200 kilogram preserved blue whale heart
[source, read more: buff.ly/3VDvmNk]
267
There's one account that has been systematically copying & pasting my tweets and @gunsnrosesgirl3's ones. In the space of a couple of days, they uploaded a huge proportion of our accounts. We work for free, they use affiliate links to earn money 1/🧵
268
In 2013 it was estimated that there was ~86 million tons of plastic pollution in the world's oceans [buff.ly/2JRpMGM]. By 2050 there could be more plastic than fish in the oceans by weight. This video [buff.ly/2WsfI8O] was filmed in Dominican Republic in July 2018
269
In this cherry blossom sake cups, the ice cold liquid produces blue blossoms on the initially bare branch, but pour in a hot beverage and the branch fills with pink flowers [source, read more: buff.ly/3xszSo7]
270
This popular video filmed in 2011 in the General Motors lab at the University of Pennsylvania by YT's oneXatXaXtime, shows how food coloring in glycerine is mixed by turning a drum, then unmixed by reversing [source: buff.ly/3fzN29a] [explanation: buff.ly/2S22Y75]
271
The left galaxy is the Milky way, the right one the Andromeda galaxy. This is what will happen within 4 to 5 billion years from now
[📹 SaltyMikan + read more: buff.ly/3m1MX0W]
[2012 NASA model: buff.ly/39FAN8e]
272
Auto-targeting fire sprinkler systems are intelligent fire extinguishing equipments used in interior large spaces
[read more: buff.ly/2TzaR6R]
[📹: buff.ly/3fEcMVi]
273
No one, presently, sees the Moon rotate like this. That's because the Earth's moon is tidally locked to the Earth, showing us only one side. But thanks to the Lunar Reconnaissance Orbiter, a high resolution virtual Moon rotation movie has been composed buff.ly/3eJlcoq
274
Emperor penguins transport their chicks on their feet. Some of them might be doing that the wrong way
[source and full video: buff.ly/34Ew5nI]
275
The Ruppert Archaeopteryx is a high-wing, single-seat, foot-launchable microlift glider
[read more: buff.ly/3pxI6ae]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links