Friday, 24. August 2007


Find out about

- why some faces are more beautiful than others
- how scienctists help unravel the mystery of beauty and
- the dangerous relationship between a beautiful body and social power

Beautycheck - don't miss the online experiment babyfaceness ...


Posted at 24.08.07 @ 12:19 | Category Knowledge & Science |

Galileo's Compass



The term "compass" or "compasses" denotes a wide range of instruments for drawing, measurement, and proportional calculation. Besides the more common compasses for drawing circumferences, widespread since antiquity, the Renaissance has left us a great number of special compasses, whose names reflect their specific functions: oval compasses to draw ellipses, hyperbolas and parabolas; two-point compasses—also called dividers—to divide lines and transfer measurements; nautical compasses, to track routes on sea-charts; compasses with curved points, called gunner's compasses, to measure mouths of cannons, cannon balls, and columns; three-legged compasses to reproduce maps; four-point compasses, or reduction compasses, to enlarge or reduce drawings, divide lines and circumferences proportionally, and draw polygons; eight-point compasses to measure fractions of degrees and carry out proportional calculations; proportional compasses to perform arithmetic, geometric, and trigonometric calculations and to measure weights, gradients, and distances for military use; and sophisticated surveying compasses that combined a magnetic compass, a windrose, and optical sights for surveying and for drawing topographic maps.

Galileo's Compass - an educational interactive application to explore online the history and uses of Galileo's compass.

The right-hand side bar has links to interactive features, such as diagrams of an astrolabe and Galileo's compass, and a digital archive of materials of the discoveries of Galileo.

Check also the simulation.


And don't miss
How to make Galileo's compass (pdf).

Posted at 24.08.07 @ 11:45 | Category Knowledge & Science |

Great Shadow Puppetry

Very inspiring!

Raymond Crowe offers a captivating shadow puppetry performance with Louis Armstrong's "What a Wonderful World".

(via Neatorama)

Posted at 24.08.07 @ 10:40 | Category Clips & Pics |