251
Born 231 years ago #Today, Charles Babbage was a polymath, a mathematician, a philosopher, an inventor and a mechanical engineer: he originated the concept of digital programmable computer bit.ly/2l0v7gk
252
The radula is an anatomical structure that is used by mollusks for feeding, sometimes compared to a tongue
[read more: bit.ly/2haGZKN]
[source, full video: buff.ly/3hNaT7J]
253
40 years ago #Today, The Man of the Year in Time magazine was a non-human for the first time. A computer received the honour as 1982's “greatest influence for good or evil” bit.ly/2C7YmoM
254
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]
255
Ladybugs rely on elasticity to flap out their hind wings, which are 4 times the size of the ladybug itself. A ladybug is flapping these huge wings 85 times a second.
[read more: buff.ly/3GfRwjA]
[📹 Legendary Shots: buff.ly/3C2HLml]
256
The mirror
[read more 1: buff.ly/3C1iskR]
[read more 2: buff.ly/3C0w2oq]
257
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]
258
This infographic visualizes the difference between Euclidean, spherical and hyperbolic geometry
[source: buff.ly/3hHuy9j]
[read more: ow.ly/AO0630q1yht]
259
This glimpse into Paris in the 1830s is an example of peepshow or tunnel book, a kind of virtual reality of the time capable of giving the illusion of depth and perspective.
[read more: buff.ly/3Vmh3fl]
[the book: buff.ly/3HZX4A4]
260
Flowers of passiflora incarnata have five bluish-white petals. They exhibit a white and purple corona, a quite complex structure of fine appendages between the petals and stamens. The large flower is typically arranged in a ring above the petals and sepals buff.ly/2IEfeFe
261
This is a White-breasted Nuthatch. When it is confronted with an enemy (especially squirrels), including a rival nuthatch, it spreads its wings, then slowly rocks back & forth
[read more: buff.ly/3hOsKxN]
[📹 SJ 1st View: buff.ly/3PTs3Q7]
262
Vacuum excavations overcome damage to buried pipes and cables. As well as guaranteeing consistently high suction performance and low maintenance, putting a stop to high cost and inefficient manual excavation [source, bforceAU: buff.ly/2TYt6Vj]
263
You won’t find any diamonds at Diamond Beach, Iceland, but magnificent shards and orbs of ice that sparkle as clear as diamond
[read more: buff.ly/3Wmimwj]
[📹 Braden Stanley: buff.ly/3KSMz0w]
264
One year ago #Today, the James Webb Space Telescope was launched
[video: buff.ly/3hLj5bj]
[art by Ben Alp, van Gogh's Starry Night with the first image from JWST: buff.ly/3vlh6xe]
265
264 years ago #Today, the predicted return of comet 1P/Halley was first sighted by Johann Georg Palitzsch. Edmond Halley had predicted in 1705 the return of the comet every 75.5 years. For the first time the scientific prediction had been proven bit.ly/2C52msG
266
“Nature and Nature's laws lay hid in night:
God said, Let Newton be! and all was light”
― Alexander Pope
#HappyBirthday #IsaacNewton
(born 380 years ago #Today)
[gif: buff.ly/3JrvMB4]
267
And a classic one to wish you all a Meʳʳʸ = x - mas
269
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]
270
The story of Nigel Richards, the man from New Zealand who memorized every French word in the French scrabble dictionary and won the French Scrabble Championship without speaking any French
[read more: buff.ly/2rK5wi4]
271
3D augmented reality educational packages allow students to learn through a simple visual approach. This app for example explains the role of Earth's inclination in determining the seasons and the daylight duration
[read more: foxar.fr/en/education]
272
Tigers live in lush tropical jungles with lots of wide rivers. They can have territories as large as 100 square km and being able to swim across rivers is a big evolutionary advantage
[read more: buff.ly/34V46EK]
[📹 buff.ly/3VlnvU0]
273
3D artist Jigar Patel (@jigpx) makes mesmerizing computer graphic animations. He created a series of brilliant clips called “Logo Factory”, and it's quite hard to stop looking at them
TikTok: tiktok.com/@jigpx
Instagram: instagram.com/jigpx/
274
This is how a Fibonacci spiral is built
[read more: buff.ly/2ozEkeS]
[source of the gif: buff.ly/3mCJZBI]
275
The flowers of Geum triflorum (or prairie smoke) are arranged in umbels of 3 to 5 flowers: their ring of many stamens sometimes produce nice shapes
[read more: buff.ly/2tP0Vbs]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links