Let me ask you a question:
Just think of the word Nature and close your eyes. What do you see ?
For me I used to hear buzzing crickets in a dense forest. Some people whom I asked this question remembered the famous photos of ice capped swiss alps, green valleys and the blue lakes (straight from a calendar hanging from your house)
But there are many aspects to nature.
We never think of the blistering heat of Sahara Desert, the sand dunes of Niger , the merciless cold of the antarctic, the deep million strong bat infested caves in the world, the mountainous regions of Andes or the mighty himalayas or the fresh water sea of Amazon or the mighty coniferous forests with its 5000 year old trees or the great African Plains or Deep Sea sea urchins and sea anemones and creations like Blue Whale.
This is similar to a question which a professor asked me sometime ago in my college days. When someone asks you, think of a number we end up thinking of natural numbers. No one thinks about sqrt(5)+isqrt(3) or some numbers like that, lamented the professor.
The world is so diverse bursting with life. There are many places where people like us (armchair travellers) won't visit. But to hear the tales and more importantly to see them is sheer bliss. It is like seeing and understanding the diverse world god has created for us. In fact it is like seeing one aspect of GOD himself if you see the nature he has created for us.
I am really happy that I saw the whole series of Planet Earth. In summary you can say that it is a mix geography and biology : But it is done with some so much passion and pain staking detail for a period of four years, that I just cannot summarize the whole series as a mix geography and biology .
Everyday all forms of lives : Trees and animals battle for survival. There are so many things in the series that I cannot put it in one post.
Watch the series Planet Earth: It is really worth 8hrs of your time. I watched the series over a period of 10 days. But I feel good as a earthling now!