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I can never be incognito... but I love it!

The sand stones had fragments of charcoal on some surfaces but found no recognisable fossils.

You will not solve global climate change by hitting the delete button.

There is a glacier in Iceland, Solheimar, which has retreated a great deal, and every time I go back there and see what's not there any more, it does something to the heart. It makes you realise it's possible for a gigantic natural element to just disappear.

We may have charted all the continents on the planet, and we may have discovered all the mammals, but that doesn't mean that there's nothing left to explore on Earth.

One does not discover new lands without consenting to lose sight of the shore for a very long time.

Almost all these hotspots around the world, most have been destroyed to the point where there is no wildlife and very little of the natural world left.

Of course there is still unexplored terrestrial territory, but most of it is waterlogged. Submersed secret places, such as the Challenger Deep, which today lure hi-tech adventurers like Richard Branson and James Cameron, will undoubtedly provide welcome fodder for 'National Geographic.'