Episode 54: Wild Forests/Living Soil

The green jewel is full of secrets. From the vast tundra to the mixed forests at our doorstep and the hot, humid rainforest, forests are vital for both humans and animals. Trees are not only the tallest living beings on Earth but can also live for thousands of years. They provide oxygen and cool the climate. Countless animals call the layers of the forest home. However, even more animals live in the ground beneath our feet than above the earth: trillions of tiny soil dwellers are constantly eating or being eaten. But how is soil formed? Why can it be lost? And why is the earthworm a good gardener?.