2476
This video shows some plant species that use different methods of propulsion to spread their seeds. Squirting cucumber's seeds can reach a speed of 95 km/h
[full video by BBC Earth Unplugged: buff.ly/2E9jqL7]
2477
In the Arctic circle, ducks take advantage of permanent holes in the sea ice, fighting the fierce ocean currents to dive 10 meters down and reach the rich layer of mussels that populate the sea floor. Some ducks can dive as deep as 60 meters to forage buff.ly/2PWRKRB
2478
European starlings are exceptional mimics, including human speech. Their ability at mimicry is so great that strangers have looked in vain for the human they think they have just heard speak buff.ly/37Mny47 Stella the starling is an example: buff.ly/2ATavSg
2479
One grain by itself is a solid, but many grains together can behave like a solid, a liquid or even a gas. The Avalanche Disk at Chicago Museum of Science and Industry, provides a window for watching granules flow, shear, mix, separate and freeze ow.ly/q8tf30ncQFQ
2480
Swedish king Eric XIV's parade armour was made in Arbogain 1562 & decorated in Antwerp by goldsmith Elisaeus Libaerts. One detail of its magnificence, is certainly given by its sabaton's extreme flexibility [3D model: buff.ly/3pRtUX9] [source: buff.ly/3dHeQch]
2481
Modular LED wall panels often allow an easy, seamless front and back replacement of the tiles
[📹 leddisplayalex: buff.ly/3htQGpS]
2482
Cave popcorn are small nodes of calcite, aragonite or gypsum that form on surfaces in caves.
Touching them, results in a captivating wind chimes like sound.
Unfortunately, a hand touch can damage them
[source, read more: buff.ly/3ZfjmUu]
2483
An incredible capture of 81 skydivers in a ‘canopy formation’. The dive occurred on November 25, 2006 and was planned by a group called CF World Record 2005. Jumpers dropped in from an altitude of 7,300m descending at an incredible 300 m per minute buff.ly/2KpGN7l
2484
Light tubes are physical structures used for transmitting or distributing natural or artificial light for the purpose of illumination [buff.ly/3uDYKGs]. This video shows how a solar tube works [full video: buff.ly/3bGYttH]
2485
When bees feed on the pollen of rhododendron flowers, the resulting honey can pack a hallucinogenic punch. Honey hunters in Nepal make dangerous vertical climbs to harvest it since it sells for $60-80 a pound [read more: buff.ly/2uo87Pi]
2486
Hura crepitans is also known as sandbox tree or dynamite tree. It's covered in spikes, it has a caustic, poisonous sap used by fishermen to poison fish and has explosive fruits whose seeds can be launched at 70 meters per second (252 km/h) [read more: ow.ly/EICl30nI4Nx]
2487
This amber bear amulet was found in 1887 in a peat bog near Slupsk, a city in northern Poland and has been dated between 5000 and 2000 BCE. But you cannot eat it [read more: buff.ly/3R3d6eb]
2488
The versatile articulated aerial robot DRAGON can manage aerial manipulation and grasping by vectorable thrust control
[full video: buff.ly/3Av10o0]
2489
The Wärtsilä-Sulzer RTA96-C is the largest reciprocating engine in the world. It's designed for large container ships: it produces 109,000 horsepower.
[read more: buff.ly/3iSed43]
[source: buff.ly/3VJWlal]
2490
Have we ever seen the skin of a dinosaur? In some places, mummified dinosaurs' rests have been found and a process called permineralization (also responsible for the formation of petrified wood) preserved their skin too [source, read more: buff.ly/2EJveng]
2491
The SR-71 holds the "speed over a recognized course" record for flying from New York to London—distance 5,570.79 km, 2,908.027 km/h, and an elapsed time of 1 hour 54 minutes and 56.4 seconds—set on 1 September 1974
[read more: buff.ly/3DB6Ns8]
2492
Saltwater Brewery is known for their beer, but also because of its development and widespread marketing of a biodegradable 6-pack ring that is edible to sea life [source, read more: buff.ly/2HleZlP]
2493
Sleep evolved before brains. Hydras are living proof. Studies of sleep are usually neurological. But some of nature’s simplest animals suggest that sleep evolved for metabolic reasons, long before brains even existed [read more: buff.ly/3wduzps]
2494
Crinoids are passive suspension feeders, filtering plankton and small particles of detritus from the sea water flowing past them with their feather-like arms
[read more: buff.ly/2xnWr1a-]
[📹 Marcelo Johan Ogata: buff.ly/3GwS6qo-]
2495
When microbes decompose organic tissues below the water of polar lakes, methane is release and it's often trapped in bubbles under the surface of the ice. This is the result when you ignite it [source, learn more: buff.ly/2M6ycGv, buff.ly/2tlZEsj]
2496
Scientists have hardly ever seen anglerfish alive in their natural environment. That’s why this video, captured in the waters around Portugal’s Azores islands, has stunned deep-sea biologists [source: buff.ly/2DJOTTP]
2497
Plants do actually move: we just don't live in the same time reference frame.
This 2-day time lapse shows the so called plants' nastic movements, mostly due to changes in turgor or changes in growth
[📹 Katie Parky: buff.ly/3V9GlyB]
2498
The well-lit New York/New Jersey metropolitan area is viewed during the early morning hours as the International Space Station orbited 400 km above the northeastern United States in February 2020 [source, hi-res: buff.ly/3rZUcLu]
2499
Concentrating more on ergonomics and geometry, the MC 205 Recycled Cardboard Armchair is constructed using a push-fit system that generates maximum stability while reducing the weight
[read more: buff.ly/3ViBzOC]
2500
When John Nash, the Princeton game theorist who shared the 1994 Nobel Prize in economics and was portrayed by Russell Crowe in A Beautiful Mind, died in 2015, Princeton released his academic file to the public. This is his recommendation letter [source: buff.ly/3sqlb1m]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links