Postmodernism revealed.

What I suspected for a long time, has been nicely demonstrated :-)

http://richarddawkins.net/article,824,Postmodernism-Disrobed,Richard-Dawkins-Nature

The Dymaxion Map.

As far as I'm aware, this map projection scheme is the least distorting:

The Fuller Projection Map.

It's interesting to see the relative size of different continents and oceans. Neat!

The division of waters (1925). Woodcut.

One of Escher's earlier works (part of the "Seven days of creation" series). I really like it for its stunning representation of volume, especially considering the technique used. It's a woodcut printed in black ink, so there are no shades, only black and white. It's pretty amazing...

Day and night (1938). Woodcut in black and grey (two blocks).

Hydrodynamic effects in non-newtonian fluides.

A non-Newtonian fluid is a fluid in which the viscosity changes with the applied strain rate.

This gives rise to several interesting effects. The Barus effect:



The Weissenberg effect:



And my personal favorite, Kaye effect. The video is really well made, and it even demonstrates a steady-state (continuous) version of Kaye effect:

Benzene as a dienofile.

The only known example of benzene acting as a dienofile:"Perspective on Fluorocarbon Chemistry", D.M. Lemal, JOC 2004, 69(1), 1. It's a really good introductory article for anybody interested in fluoroorganic chemistry.

Reptiles, 1943 (lithograph). M. C. Escher.