Ethereal forms shift and swirl in photographer Thomas Herbich’s series “Smoke”. The cigarette smoke in the images is a buoyant plume. As it rises, the smoke is sheared and shaped by its passage through the ambient air. What begins as a laminar plume is quickly disturbed, rolling up into vortices shaped like the scroll on the end of a violin. The vortices are a precursor to the turbulence that follows, mixing the smoke and ambient air so effectively that the smoke diffuses into invisibility. To see the full series, see Herbich’s website.  (Image credits: T. Herbich; via Colossal; submitted by @jchawner@__pj, and Larry B)

P.S. - FYFD now has a page listing all entries by topic, which should make it easier for everyone to find specific topics of interest. Check it out!

Clean-up of accidents like the 2010 Deepwater Horizon oil spill can be complicated by what goes on beneath the ocean surface. Variations in temperature and salinity in seawater create stratification, stacked layers of water with differing densities. When less dense layers are on top, the fluid is said to be stably stratified. Since oil is less dense than water, one might assume that buoyancy should make an oil plume should rise straight to the ocean surface. But the presence of additives or surfactants in the oil mixture plume can prevent that. With surfactants present, an oil mixture tends to emulsify, breaking into tiny droplets like a well-mixed salad dressing. Even if the density of the emulsion is smaller than the surrounding fluids, such a plume can get trapped at a density boundary, as seen in the photo above. Researchers report a critical escape height, which depending on the plume’s characteristics and stratification boundary, determines whether a plume escapes or becomes trapped.  (Image credit: R. Camassa et al.)


So this is sort of a redo of the plumes page i did a bit ago since i will still working out what kind of ears i wanted them to have ect ect- ive decided to go with the old style for all normal races- and keep the other ear style strictly to Ruth rex and Tolk Rex-

As for this, the only difference between these races you need to know is color honestly- there is really no other differences. They can all have any number of these traits here, the different snouts and marking variations -

Brikkans are Browns
Sonovs are Blacks
Novinians are grey
Savintines are Blonde
Sedians are Navy Blue ish
Rustavs are Reds

the red, gold, blue markings you see are tattoos, since most rex society is all into that sort of thing- marking their plumage and what not.

 Next ill be doing a thrish line up like this, as well as one for subraces of Rex (ruth, tolk, Con, pheasant)