+
trigonometry-is-my-bitch:

at around 13.2 degrees Celsius, β-form white tin transforms to α-form grey tin due to tin pests (or tin disease). The transformation process requires high activation energy but very low temperatures and the presence of Germanium can aid in initiation. 
+
xysciences:

A domino can knock over another domino 1.5x larger than itself.
The above Gif shows a domino 5 millimeters tall starting a chain reaction 13 dominos long that eventually knocks over a domino about half a meter tall.
If the reaction was 29 dominos long, the final domino would be the size of the Empire State Building.
[Click for more interesting science facts and gifs]
+
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
zerostatereflex:

GE Advanced Materials Testing
"When we know how materials melt, shatter and bend, we can make machines that don’t."
Nice. :D
+
currentsinbiology:

GIFs of semi-intelligent slime mold growing like crazy
Just what is this pretty yellow goo? Delicious, delicious slime mold of course. Heather Barnett makes art from physarum polycephalum, a eukaryotic microorganism that lives in cool, moist areas. As part of a project on the semi-intelligent slime mold, Barnett captures its behavior “in a game of creative control and authorship,” creating a timelapse film of its growth.
In these images, she’s replicated a maze from a 2000 experiment by Toshiyuki Nakagaki that showed how the organism seeks out food sources. The slime mold had already grown into a network throughout the maze, but when Nakagaki and his team at Hokkaido University added agar to two different places within, it withdrew from the empty corners and found the shortest path between the two points of nutrition, spreading into a beautiful web that connected them.
+
bat-vomit:

afriet:

dandelion to seed head

I have wondered about this for so long.
bat-vomit:

afriet:

dandelion to seed head

I have wondered about this for so long.
bat-vomit:

afriet:

dandelion to seed head

I have wondered about this for so long.
+
mathani:

So, convex polygon with n sides can be divided into triangles in multiple ways. Remarkably, triangulations can be sorted and cycled through so that any successive two differ in one flip of the shared edge of a pair of adjacent triangles.
More formally, such graph — in which two triangulations are adjacent if they differ in exactly one flip — is Hamiltonian, and in it exists a cycle that visits each vertex exactly once.
Above: as the 7-gon cycles through all of its 42 triangulations, the 6-gon repeats its 14-cycle three times, the 5-gon repeats its 5-cycle eight times (and waits for two frames), and the quadrilateral repeats its 2-cycle 21 times.
+
spaceplasma:


An X-ray recording of metal solidifying under microgravity. The video was recorded on a Maser sounding rocket. In under seven minutes a small furnace was used to cook a metal sample to 700°C turning it liquid before it was frozen inside a cooling chamber to solidify into crystal clusters. An X-ray camera captured this dramatic experiment for analysis.

Credit: NTNU Norway–Prof. Ragnvald Mathiesen
+
zerostatereflex:

All Saturn V rockets launched at the same time.
+
currentsinbiology:

professorfangirl:

mutha fuckin GOBLIN SHARK.

The goblin shark is a rare species of deep-sea shark. Sometimes called a “living fossil” with a lineage some 125 million years old. This pink-skinned animal has an elongated, flattened snout, and highly protrusible jaws containing prominent nail-like teeth. Goblin sharks inhabit upper continental slopes, submarine canyons, and seamounts throughout the world at depths greater than 100 m.
This species hunts for teleost fishes, cephalopods, and crustaceans both near the sea floor and in the middle of the water column. Its long snout is covered with ampullae of Lorenzini that enable it to sense minute electric fields produced by nearby prey, which it can snatch up by rapidly extending its jaws.
+