Original post: “A scavenger scarab beetle, cf. Ceratocanthus sp.”
Images 1 and 2: Living pluteus larva of the sea biscuit Clypeaster subdepressus under polarized light microscopy. Only the skeleton remains visible. Photos by Bruno C. Vellutini (Wikimedia; Flickr); cc-by-sa
Image 3: Pluteus larva via ccNeLaS
Image 4: Developing pluteus larva. Via Wikimedia. Public domain
Image 5: Sea urchin development tattoo via The Loom
Caption: “Greetings! Here’s a pic of my science tat. I studied sea urchin development for my dissertation. Upon completion 2 yrs ago, I awarded myself this tat for my academic achievement. The tat is of a sea urchin egg, 2 cell embryo, blastula, gastrula, prism stage and pluteus larval stage. Or as my friend’s say, an orange developing into an Alien face-grabber.”
Black Hawk Rotor Vortex Wake
“Aft view of the UH-60 helicopter rotor detatched eddy simulation showing the 3D nature of the vortex wake. Note the separated flow leaving the centerbody in the middle of the image, and the uneven wake separation due to the blade motion.
Investigator: Neal Chaderjian, NASA Ames Research Center, Moffett Field, Ca
Visualization: Tim Sandstrom, NASA/ Ames
More info available here: www.nas.nasa.gov/SC12/demos/demo1.html
Follow us on Twitter: www.twitter.com/NASA_Supercomp ”
Animated top view here
Regular and irregular splashing of drops on geometric targets.
Gabriel Juarez, Thomai Gastopoulos, Yibin Zhang, Michael L. Siegel, and Paulo E. Arratia – Phys. Fluids 24, 091105 (2012)
From the Gallery of Fluid Motion, via IAHR Multimedia Library
Mushroom vortices in round jet
From the Gallery of Fluid Motion (probably somewhere deep in the archives?)
Image 1: ”A dish of millipedes under UV light. Most of the ones fluorescing in blue are Semionellus placidus, while the two fluorescing red are Pseudopolydesmus serratus. Red fluorescence under UV hasn’t been reported before in arthropods, to my knowledge.”
Photos by Derek Hennen. Check out his blog post for more field notes and details on identification!
Image 2: Semionellus placidus, photo by Derek Hennen (source)
Orsima ichneumon (Salticidae): a mimic of mutillid wasps
Gunung Leuser National Park, Sumatra
Photo by Arthur Anker:
“Jewel tortoise beetle sleeping”
Photo by Arthur Anker, Brazilian Amazon, 2012:
Diagram by David H. Terman, Scholarpedia:
Figure 4: Periodic solutions correspond to closed curves in the phase plane.
Diagram by Edward Ott, Scholarpedia:
Figure 1: (a) Double well potential V(x) , and (b) the resulting basins of attraction.