David Attenborough Quotes

It seems to me that an understanding of the natural world is crucial for all of us – after all we depend upon it for our food, for the air we breath and, some would say, for our very sanity. Its a relationship that we're stretching to breaking point as we continue to grow in numbers. m44s31-m44s57

And yet, today the harbour is silted up, most of the city lies buried beneath sand dunes and the land has become a desert. As the population had grown and more people wanted more fields, so more of the forest that once stood around the city was cut down, until eventually it was all gone. With no roots to hold the soil, and no attempt to conserve it, it was carried away by the wind and the rain.

But for Hatzegopteryx, the beach is a launching pad. Now his wings will carry him to yet another forest, where life proliferates more variously and more abundantly, than anywhere else on our prehistoric planet.

Immensely powerful though we are today, it's equally clear that we're going to be even more powerful tomorrow. And what's more there will be greater compulsion upon us to use our power as the number of human beings on Earth increases still further. Clearly we could devastate the world. […] As far as we know, the Earth is the only place in the universe where there is life. Its continued survival now rests in our hands.

This is now our planet, run by humankind for humankind. There is little left for the rest of the living world.

And this is where it went. In places all around the eastern Mediterranean the sea is separated from the mainland by strips of flat marshy land like this. Made up of the soil that once clothed the hills beyond. All this was deposited during the last 2000 years. This is the marsh that now separates the sea from the city of Ephesus. These ruined buildings mark the edge of the quay where once merchant ships lay moored. As the harbour died, so did the trade upon which the city's wealth was based, and so, well, ultimately did Ephesus itself. What was once one of the most splendid cities in the Roman Empire fell into decay and was abandoned.

Right now we are facing a man-made disaster of global scale, our greatest threat in thousands of years: climate change. If we don’t take action, the collapse of our civilisations and the extinction of much of the natural world is on the horizon.

There are some four million different kinds of animals and plants in the world. Four million different solutions to the problems of staying alive. This is the story of how a few of them came to be as they are.

Our planet, the Earth, is, as far as we know, unique in the universe. It contains life. Even in its most barren stretches, there are animals. Around the equator, where those two essentials for life, sunshine and moisture, are most abundant, great forests grow. And here plants and animals proliferate in such numbers that we still have not even named all the different species. Here, animals and plants, insects and birds, mammals and man live together in intimate and complex communities, each dependent on one another. Two thirds of the surface of this unique planet are covered by water, and it was here indeed that life began. From the oceans, it has spread even to the summits of the highest mountains as animals and plants have responded to the changing face of the Earth.

We have overfished 30% of fish stocks to critical levels. We cut down over 15 billion trees each year. By damming, polluting, and over-extracting rivers and lakes, we've reduced the size of freshwater populations by over 80%.

The island is immense. It's 1,000 miles long, if you discount a narrow arm of sea that crosses it in the middle, and it contains mountains over 12,000 feet high. It's New Zealand. The first land-living mammals to get here were human beings and they didn't arrive until a mere 1,500 years ago. So here you can glimpse what the world would have been like if the birds had won that battle with the early mammals and now ruled the Earth, for here they once did.

Many of New Zealand's birds flew here from Australia fifteen hundred miles away across the sea to the west. They started to do so millions of years ago, and they are still doing so today... So, if you know Australian birds, you will recognise quite a lot, particularly those that are relatively recent arrivals.

Living on the bodies of mammals, oxpeckers manage to get quite a varied diet. A maggot here, a tick there, a little sip of blood, perhaps a little tasty earwax.

Fifty years ago, when the WWF was founded there were about three billion people on earth. Now there are almost seven billion. Over twice as many - and every one of them needing space. Space for their homes, space to grow their food (or to get others to grow it for them), space to build schools and roads and airfields. A little of that space might be taken from land occupied by other people but most of it could only come from the land which, for millions of years, animals and plants have to themselves.

Without thermals, [raptors] can't travel far. But the snow geese fly on... They navigate by the stars.