1801
Division by zero is a mathematical challenging concept: see what happens when you try in on a mechanical calculator
[source, read more: buff.ly/3lvqQkX]
1802
This video shows a little skate (Leucoraja erinacea) embryo hatching from its egg
[read more: buff.ly/3DGJWh6]
[📹 Andrew Gillis, University of Cambridge: buff.ly/3qUa8xa]
1803
Dolphins produce all sorts of bubbles by releasing air from their blowholes, including bubble rings. Many of these serve as visual displays, a kind of communication signal
[read more: buff.ly/3TkYrvS]
[📹 Aaron Rix: buff.ly/3eIU6DL]
1804
This video by UniServeScienceVIDEO provides a visualization of the magnetic field lines that surround a small cylindrical bar magnet. Front view of a 3D Magnetic Field Demonstrator which is an Oil Filled Cube with a suspension of iron powder [full video: buff.ly/3bI9E5J]
1805
Moon and Venus conjunction behind Christ the Redeemer on the Corcovado mountain, Rio de Janeiro on September 8, 2013
[📹 Josselin Desmars: buff.ly/3EzGgOu]
1806
«Comparative tests on a human and a chimpanzee infant of approximately the same age» is a film from 1932 featuring silent black and white footage of Withrop Kellogg's study. This is the famous scene of the tickling
[video: buff.ly/3KmeCVW]
1807
Deep brain stimulation uses implanted electrodes & electrical stimulation to treat movement disorders associated with Parkinson’s disease. This 2018 clip shows a retired Royal Marine's experience: buff.ly/3TprGyq
[more: buff.ly/3vzU5rG]
twitter.com/AmazingPosts_/…
1808
Turritopsis dohrnii is a species of biologically immortal jellyfish. If it is exposed to environmental stress, physical assault, or is sick or old, it can revert to the polyp stage. Theoretically this process can go on indefinitely
buff.ly/2EiGNXV
1809
This crab was supposed to be an easy snack for a bald eagle, but nature always has some surprise (and a crab a few tricks up its claws)
[from «Island of the sea wolves»: buff.ly/3MGePok]
1810
Floating soaked loops of thread onto a soap film. How surface tension pulls the thread into round loops
[source: buff.ly/2rXZJ5y]
1811
Situated in the Chartreuse mountains, southeastern France, la Tour Percée is a unique double arch and at 32 meters is the longest span in the Alps. The existence of this arch was only documented in 2005 [David George, read more: buff.ly/3onDUKn]
1812
Although they may resemble shrews, hedgehogs, or opossums, tenrecs are not closely related to any of these groups. This one at the Smithsonian's National Zoo is dust-bathing and rubbing the new scent into its spines [source: buff.ly/3ovZYRA-]
1813
This floating bridge built in the Shiziguan area of the Hubei Province, China is 500 m long and 4.5 m wide. It was built over a winding river whose maximum water depth is ~60 m
[read more: buff.ly/3dHD5FT]
[source: buff.ly/3yeWNCi]
1814
Cownose rays typically swim in groups, which allows them to use their synchronized wing flaps to stir up sediment and expose buried clams and oysters, sometimes even surfing a wave
[read more: buff.ly/3CFV0XP-]
[video: buff.ly/3l2cd7L-]
1815
Researchers have developed a handheld 3D skin printer that deposits even layers of skin tissue to cover and heal deep wounds. The team believes it to be the first device that forms tissue in situ, depositing and setting in place, within two minutes or less buff.ly/2rge8ZD
1816
When a cat discovers refraction
[source of the gif: buff.ly/3XDTOQn]
1817
Laser varnish removal from wood is a perfect way, to remove coatings from complicated geometries of the surface
[source, HD, IRLaser: buff.ly/3nwlGVE]
1818
Needlefish, like all ray-finned beloniforms, are capable of making short jumps out of the water at up to 60 km/h (37 mph)
[read more: buff.ly/2KJOggq]
1819
Artificial reefs proved to be an effective way to sustainably improve fisheries’ productivity. This is how one built in Little Abaco is full of white grunts, lobster, and more after 6 months
[learn more: buff.ly/3GDmTFb]
1820
The story of the longest duration flight. Between 1958 and 1959, Bob Timm and John Cook remained aloft for a full 64 days, 22 hours and 19 minutes on a Cessna 172, setting a record that stands to this day. In the photo, a refueling operation [read more: buff.ly/2XJqhdN]
1821
The Mayan city of Chichen Itza is full of architectural & engineering marvels. But El Castillo does even more: clap your hands at the base of the stairs and the song of a sacred Mayan bird will echo through the air [source: buff.ly/3iHZt2z] [more: buff.ly/2Fsl1wR]
1822
Holoportation is the act of scanning in 3D to send a volumetric video anywhere in the world and in real time. Holoforge Interactive uses Azure cameras with depth sensors to give the feeling of real person presence [video: buff.ly/3JGX4nk]
1823
IBM's ThinkPad 701c's unique butterfly keyboard rocked the laptop world when it debuted in 1995. This video shows it in action [read more: buff.ly/2EhUJfm]
1824
The Turkish coffee looks like an apparent violation of the laws of thermodyamics, but there's a pretty simple way to brew it
[read more: bit.ly/2fGy5n2]
[📹 buff.ly/3F3rFtB]
twitter.com/magioliveira/s…
1825
Miners carbide lamps were powered by the reaction of calcium carbide (CaC₂) with water (H₂O). This reaction produces acetylene gas (C₂H₂) which burns a clean, white flame
[read more: buff.ly/3prOhwd]
[📹 Jesse Marosek: buff.ly/3dCxunM]
Astronomy, astronautics, meteorology, physics. Engineer, trying to build the big picture of #science via selected & curated pics, videos & links