A number of striking sculptures from the first solo exhibition of Korean artist Jang Yong Sun entitled Particles of Dark Matter. Sun welds thousands of steel rings to form these amoeba-like structures that despite having the appearance of being precariously fragile must be extremely heavy. If you like these, you might also enjoy the work of Mike Castator. (via 준다메다 and art company gig)
A viscous fluid inside a horizontally rotating circular cylinder forms a shark-tooth-like pattern along the fluid’s free surface. This is one of several patterns observed depending on the fluid’s viscosity and surface tension and the rotational rate of the cylinder. (Photo credit: S. Thoroddsen and L. Mahadevan; for more, see Thoroddsen and Mahadevan 1996 and 1997)