Colourful Planet (E03)

We think of the Earth as a blue planet, but satellite cameras reveal it to be a kaleidoscope. The astonishing colours of the aurora are towering vertical streaks, hundreds of kilometres high, phytoplankton blooms turn the ocean into works of art, triggering a feeding frenzy, and for a few weeks a year China's Yunnan province is carpeted in yellow as millions of rapeseed flowers bloom. (BBC)