Earth

00:00:42 Of all the planets in our universe

00:02:43 in a world that is rapidly changing.

00:06:22 The cubs haven't been fed this morning.

00:08:07 lf they don't make it there before the ice breaks up

00:11:28 stunted conifers are still locked in ice.

00:14:05 Visitors flock to this haven from all over our planet.

00:17:14 ln the chaos, the young can be separated from their mothers.

00:20:57 lt's her job to lead the way.

00:25:04 and yet, it contains more than half of all the plants and animals on Earth.

00:28:20 the show can begin.

00:31:54 and thousands of elephants have started the desperate trek for food and water.

00:34:48 but they would all be at risk if they waited for the mother and the calf.

00:40:59 but they're desperately thirsty now.

00:44:58 The cats have to find an opening in this defensive wall of hide.

00:49:38 the Himalayas.

00:54:46 sunlight and fresh water bringing life to every corner of Planet Earth.

01:00:22 they've arrived.

01:05:11 and it depends entirely on a healthy ocean all along the way.

01:10:23 are a vital part of a healthy ocean...

01:14:55 Summer is drawing to a close in the north, but here it is only just beginning.

01:18:48 but krill depend on ice and ice is in decline.

01:23:08 The walrus sense the danger.

01:26:35 The bear is no longer a threat.

01:30:09 it is in our hands.