Pitch is a liquid, but you could've fooled us! It looks solid, it feels solid and you can shatter it into pieces with a hammer. 

When we were young we thought that if we closed our eyes in certain circumstances we would become invisible. Didn't work then, but it might now.

Pop quiz: What do Kibo, Zarya and Zvezda have in common? They're all components of NASA's International Space Station (ISS) and feature as this year's calendar gals.

What do Bach's "Art of the Fugue", the planetary orbits of our Solar System, palindromes and the concept of infinity have in common? They've all been brought together in Daniel Starr-Tambor's mind-stretching "Mandala".