The team of whales work round the clock for the boom is short-lived.
Summer is already fading, and the whales will soon be forced north as winter returns.
The sun's influence diminishes and the ocean starts to freeze.
The greatest seasonal change on our planet is underway.
The ice grows at an extraordinary rate, advancing two and a half miles a day.
In a matter of weeks, the continent effectively doubles in size.
Life flees from Antarctica. But one creature is just arriving.
Every winter, emperor penguins leave the comfort of their ocean home and begin a remarkable journey.
They head towards their breeding grounds, almost 1 00 miles inland.
Eventually, the emperor penguins reach the place where they were hatched,
an area sheltered by icebergs, trapped in the frozen ocean.
Here they will raise the next generation.