Andrew Scott narrates a special programme about winter and explores how animals and plants rise to the challenges it brings.

With winter fast approaching, life has to get ready and that means feeding up while you can, fighting for the last chance to breed and rushing to grow up before the cold returns.

Celebrate the glorious nature of summer on Earth and the extraordinary ways in which animals and plants respond to challenges.

Àngels Barceló shows us how spring comes to our planet, from bear cubs to flowers in the desert. In addition, we discovered how animals face the challenges of this season.