Paul develops infrared telescopes to observe galaxies.  The technology has also been adapted to diagnose cancer by looking at chemical signatures in the human body.  He emphasises the importance of problem solving and programming skills to work in his role. 

There are two cuts of the video – one aimed at...

This video demonstrates how the human eye will average or blend fast-flashing red, green and blue lights to produce violet light.  However, if a ball containing the red, green and blue lights are spun the individual lights are clearly visible.  This is because the eye will not merge the separate colours if they...

This video explores the fate of the universe from an historical position. It explains how the rate of expansion of the universe can be measured.

This video provides a brief introduction to the seven base units used in physics. Base units are identified with their symbols and S.I units.

The origin and definition of the metre is explained and reference to Wikipedia is made for definitions of the other base units....

This issue of Big Picture provides lots of interesting information about flowering plants and their uses. 

The plant hormones animation explores the action of indole-3-acetic acid (IAA) and shows how scientists used experimental evidence to explain the role of auxins in a phototrophic response.

The...

This video explains the difference between unpolarised light and plane polarised light in terms of using a slit to eliminate unwanted electric wave orientations. It is a continuation of Electromagnetic waves: why they are transverse....