Why is the sky blue?
Why is the sky blue, why are sunsets red, why is the ocean blue, Short explanation with quiz to test your understanding of why the sky is blue....
Specials : Nature
A round-up of the top science news stories of the past 12 months. Nature 468, 1014-1016 ( 22 December 2010)
Spirals in nature, science and art
Spirals and Helices A spiral is any plane curve that winds around a point in successive convolutions, the curve receding more and more from the point that is called the center.