2176
Fractal spirographs are generated by tracking a series of circles rotating around each other as shown in this animation by PantheraLeo1359531
[source: buff.ly/3LcfOf7]
2177
The worst problem of the planisphere projections, we know, is the distortion of the true scales, so Deviantart artist Brett Drager makes this kind of interesting comparisons. This is the Mediterranean Sea superimposed on Australia [source and more maps: buff.ly/3DXYQg4]
2178
Made with 6,000 moving parts, The Writer is a 240-year-old machine created by Swiss-born watchmaker Pierre Jaquet-Droz, his son Henri-Louis, and Jean-Frédéric Leschot around 1770-1772. It can be programmed up to 40 letters or signs [video: buff.ly/2ozVXR7]
2179
The Long Room of the Trinity College Library in Dublin, Ireland, at nearly 65 meters in length (213 ft), is filled with over 200,000 of the library’s oldest books [source, read more: buff.ly/2JR6VaK]
2180
In an experiment, African grey parrots were taught to buy food using tokens. When paired up, without any incentive for sharing, parrots with tokens started to give some to their partners which had no tokens, so that everyone could eat [read more: buff.ly/35E2kTl]
2181
Ta Prohm is a temple at Angkor, Cambodia, built in the late 12th & early 13th centuries. Huge trees, reminiscent of ancient redwoods and oaks, are blended into the walls, and rocks hugging the giant roots gives the temple a surreal appearance [read more: buff.ly/3CJaQkk]
2182
Space start-up Relativity Space Stargate device is capable of building a rocket fuel tank with a 3D printing process. This is a time lapse of the printing process of the ACO tank for the Terran 1 rocket [read more: buff.ly/2nvsGXn]
2183
This mechanical undeground garage of piazza Einaudi in Brescia, Italy has 700 parking places on three floors, but the most appealing feature is this elevator
[source: buff.ly/3nLxfJs]
[location: buff.ly/2Zi9uiL-]
2184
The acraga goa moth caterpillar is also known as crystal or jewell caterpillar. It's covered with gelatinous tubercles protecting it from predators
[read more: buff.ly/3r7HEkM]
[video: buff.ly/3124gsh]
2185
Meet the bowerbird - one of the most flamboyant birds in the natural world. Bowerbirds go to extreme efforts to attract a mate, constructing delicate nests and decorating them with what humans might throw away [source, BBC Earth: buff.ly/3FEBwEG]
2186
One of the most curious properties of dragonflies is probably that their wings kill bacteria on contact. They do it by ripping apart the bacteria's cell membranes with sharp nanopillars as they move across the surface of the wing [read more: ow.ly/6KZN50wzlKD]
2187
This picture was shot by photographer Adriana Franco while flying on a trike ultralight over the coast of Baja California, México, where the sea joins the desert forming rivers of tree-like figures [source: buff.ly/3vxm09A]
2188
In 2016 Ticket To The Moon, along with its mastermind and project coordinator Igor Scotland, designed an impressive 80 meters long hammock caravan 200 meters above the Canyon sector Oker more than 200 meters above the canyon floor [video: buff.ly/2JN13j8]
2189
This chart doesn't pretend to be an exhaustive treatise about photography, but it's an interesting basic “cheat sheet” showing the "things" that make up exposure [source, read more: buff.ly/2nUbYBb]
2190
The wingbeats of birds, insects and mammals have a shape: discover which one in this animated infographic by Eleanor Lutz deconstructing flight [source with higher resolution: buff.ly/2Mj2ib7]
2191
Summer in Japan means colorful explosions in the sky, where some 200 firework festivals called “hanabi taikai” are held across the country. Photographers compete to capture the most eye-opening moments of these nighttime events [source, credits: buff.ly/2xIszeI]
2192
This close up picture shows where a snake's venom comes from: the fangs of a rattlesnake (left) and a Gaboon viper (right)
[📷: Juan Alvarez, source: buff.ly/3qtxyt8]
2193
Flame weeding is an alternative method of weed control and for some agricultural productions, it can be the most sustainable economical solution
[read more: buff.ly/3HXRo7o]
[clip by Jamie Gilchrist: buff.ly/2Hal5SF]
2194
Refraction of light through a glass slab using a laser beam
[full video, Vinod Avnesh Kumar: buff.ly/3Dfragv]
2195
Things aren’t always what they seem on the surface. 12,000 years ago Britain was connected to Europe until a tsunami from a submarine landslide off Norway inundated whatever remained of #Doggerland bit.ly/2zCZRdo [read more: ow.ly/8lng30nkkdR]
2196
The Baatara gorge sinkhole in Lebanon is a triple waterfall that drops 255 meters (837 ft) into the Baatara Pothole, a cave of Jurassic limestone [read more: buff.ly/2JR9GsR]
2197
Lumpsuckers' bodies are nearly spherical and the "sucker" part refers to the fish's modified pelvic fins, which have evolved into adhesive discs
[read more: buff.ly/2q10ngJ]
[📹 RUNCL Fishing: buff.ly/3qOAAqp]
2198
There are 7 species of potoos in one genus, Nyctibius, in tropical Central & South America. They are nocturnal insectivores sometimes called poor-me-ones, after their haunting calls and they're often camouflaged to look like part of the stump they perch on buff.ly/3tjzqDV
2199
In Budapest there's a fountain that looks like a book: every few seconds a sheet of water blasts forth from the book's spine, arcing from one side to the other, creating the illusion that an invisible force is turning the pages of this marble tome [video: buff.ly/3gc348s]
2200
Braarudosphaera bigelowii is a unicellular, eukaryotic phytoplankton with a long fossil record, extending back to 100 million years ago. This is what its dodecahedral exotheca with twelve pentaliths looks like under the electron microscope [full paper: buff.ly/2Hu5Oj0]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links