Dense pack logistics

How dense can one pack spheres of arbitrary size distribution?

We present the first systematic algorithm to estimate the maximum packing density of spheres when the grain sizes are drawn from an arbitrary size distribution. With an Apollonian filling rule, we implement our technique for disks in 2d and spheres in 3d. As expected, the densest packing is achieved with power-law size distributions. We also test the method on homogeneous and on empirical real ...

My pack is cuter than your pack.

Faced with bans on advertising, the tobacco companies are looking to new, more subtle ways of maintaining their brands' profile in the public eye.

Darwin pack

The volume has the feel of an intimate scrapbook of many of the key events and documents in Darwin’s life. But it is more than just a scrapbook: the words are written by science historian, John van Wyhe. A distinguished Darwin scholar at Cambridge University, van Wyhe is also director of the major project to make the entire work of the evolutionary biologist available electronically. Darwin Onl...

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