December 2007

An analogue of honey made in the home ‘lab’ — ie. the kitchen. In Romania.

An old favourite - table-tennis balls hovering in airflow from a hairdryer - with a little twist.

A very basic way to demonstrate the Doppler Effect, and hence explain redshift.

An introduction to quarks, with animations, diagrams, and pictures.

A curious little toy that will spin merrily in one direction - but refuses to go the other way.

If the police collect a sample of your DNA from a crime scene, they can keep it on file indefinitely. Good idea, or bad idea?