Topological matter refers to systems in which topology is required for their characterisation. This includes materials with topological defects such as skyrmions, or topologically-protected edge ...

Above: A Von Karman vortex street downwind of the Canary Island chain in the eastern Atlantic Ocean off the coast of Africa on Feb. 27, 2015. Image credit: NASA Worldview. Editor's note ...

LG Vortex. Info Photos News Forum 15 Reviews 11 . 1 of 4. This close cousin of the Optimus S is mostly similar.

Vortex 10x50 Crossfire HD Binocular. View at Amazon. View at BHPhoto. View at Adorama. Best mid-range model. The pair you need if a wide field of view and a good sturdy build quality top your brief.

Vortex Recon R/T 15x50 monocular Though quite expensive, it provides an impressive 15x magnification, allowing you to see objects much closer than regular astronomy binoculars or monoculars.