Oceans are the Earth's most significant biome, covering over 70% of the planet's surface. However, much of the ocean is devoid of life. What are the reasons behind this, and what factors go into ...

Some of the world’s main biomes include rainforest, desert, savannah, grassland, woodland and tundra. Each biome has characteristics that make it unique, for example Alaska is a type of tundra.

This clip is from the series Ecosystems and Biomes. This could be used to introduce students to the ecosystem of the desert and how people, plants and animals adapt to the conditions. Students ...