1751
Sinkholes form through both natural and human-made processes. Watch this interesting lab modeling and demonstration by YouTube channel Practical Engineering explaining how this happens
[Model by Practical Engineering: bit.ly/2tnmUry]
1752
In this video by QuantumBoffin, an experiment demonstrates the total internal reflection of light inside a glass block. An angular scale is used to measure the critical angle and determine the refractive index of the glass [full video: buff.ly/3eDRoNG]
1753
Rotational / Translational transmission
[📹 veproject1: buff.ly/3i3fchS]
1754
Striped Indian mackerels open their cavernous mouths as they swim, sieving zooplankton with gill rakers like a net. This picture by Alex Mustard is possibly one of the most explanatory of this behavior
[source: buff.ly/2RHCJaw]
1755
The Jabuticaba is a tree native to Brazil whose flowers and its fruits grow directly from its trunk [read more: bit.ly/2gv3D2V]
1756
The science of chapati, the expandable flatbread from the Indian subcontinent [read more: buff.ly/2It36Yp]
1757
Starlings imitate a variety of avian species & have a repertoire of about 15–20 distinct imitations + non-avian sounds. This one seems even capable of beatboxing [read more: buff.ly/3CWLUXs-] [source, BBC Springwatch: buff.ly/3H9peWo-]
1758
Plants do actually move: we just don't live in the same time reference frame. This 3-day time lapse shows the so called plant's nastic movements, mostly due to changes in turgor or changes in growth buff.ly/30a2rqp [source, full time lapse: buff.ly/3eTvEdw]
1759
A LEGO gyroscope unicycle
[source, diamabolo: buff.ly/3Idv247]
1760
Samanea saman, is a species of flowering tree in the pea family. It usually reaches a height of 15–25 m (49–82 ft) and a diameter of 30 m (98 ft). This is located in Alae Cemetery, Wainaku, Hawaii
[source, alexjbauer: buff.ly/3Uyezeb]
1761
Zoologist Clinton Hart Merriam described raccoons as "clever beasts", with reason. In a study, raccoons were able to open 11 of 13 complex locks in fewer than 10 tries. This BBC video gives a demonstration
[video: buff.ly/3eWpkTY]
[paper: buff.ly/33gvpFE]
1762
How in 1966 the Soviet Union used a 30-kiloton nuclear weapon to extinguish an out of control natural gas well fire [video, full story: buff.ly/2vuMhao]
1763
Winged manakin males have evolved adaptations to suit the females' attraction towards sound. They shake their wings 100 times a second producing a high-pitched note: an effect known as sonation [full video by birding ecu: buff.ly/3o7Mxs6-]
1764
Supension demonstration
[📹 jpymotor: buff.ly/3HOQZGC]
1765
Oysters are able to filter (and ultimately clean out) water through their digestive system
[read more: buff.ly/2nnCNxp]
[source, oysterrecovery: buff.ly/3R8R3Ch]
1766
Do spiders dream? A new study suggests they do.
These jumping spiders rapidly move their eyes and twitch during rest, suggesting they have visual dreams, never before observed in arachnids
[read more: buff.ly/3Q625s2]
1767
Created by MIT CSAIL, this shape-shifting robot can walk, roll, sail, and glide using recyclable exoskeletons
[read more: bit.ly/2xDaH4y]
1768
It never gets old. This gif, created by Clay Bavor, puts the 747 and SR-71 aircraft speeds into perspective compared to @NewHorizons2015. 36,000 mph ~ 58,000 km/h was the speed reached at launch (Atlas V third stage cut off)
[read more: ow.ly/2g2U30o3uFp]
1769
How simple pieces of wood and hinges makes a basic mechanical binary counter
[full video, Mathmo14159: buff.ly/2rUlTF2]
1770
This Vietnamese woman making a fishing net, captured by photographer Danny Yen Sin Wong, looks as if she's swimming in a sea of green fire
[source, read more: buff.ly/2IUqRfs]
1771
Among the things that you might not know about antimatter there's the fact that bananas produce antimatter, releasing one positron—the antimatter equivalent of an electron—about every 75 minutes.That's because bananas contain a small amount of potassium-40 buff.ly/2Jbd41p
1772
This is how the world's largest ship elevator at the Three Gorges Dam, in Yichang City, central China's Hubei Province, works
[read more: buff.ly/3Gca2YW]
[📹 buff.ly/3WFtDaX]
1773
Blockchain for babies
[📹 and more, readplaysing: buff.ly/3ztlDAV]
1774
Macro photography gets amazing details of the animal world, like this wasp blowing a water bubble reflecting a rose, captured by photographer Lim Choo How
[source: bit.ly/2gLzrky]
1775
One of the most unusual breeds of pigeon is the "frillback" pigeon, which has curly feathers, giving it the appearance of a curly-haired bird
[read more: buff.ly/2LiLmQE]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links