our science correspondent pallab ghosh has more. how did life begin? humanity's biggest questions. the discovery of some of the first life forms to have ever existed on earth may begin to provide some answers. they were discovered in these rocks which were found in canada. and here it is, one of the planet's very first inhabitants. it was less than the width of a human hair and very simple. but it ate and consumed oxygen, like we do. and to the shock of this scientist who discovered it, the life forms existed hundreds of millions of years earlier than anyone had ever imagined. not long after the earth was formed. we've got it. we've got the oldest fossils. this is exciting! the oldest fossils on the planet. it relates us to our origin. i mean, this is one of the reasons for intelligent life to evolve. so, where does the life form fit in, in the story of life on earth? the earth formed just over li.5 billion years ago, a molten mass of rock that began to cool. not long after that came the first oceans which spread all across the planet. it was right at

our science correspondent pallab ghosh has more. how did life begin?of the first life forms to have ever existed on earth may begin to provide some answers. they were discovered in these rocks which were found in canada. and here it is, one of the planet's very first inhabitants. it was less than the width of a human hair and very simple. but it ate and consumed oxygen, like we do. and to the shock of this scientist who discovered it, the life forms existed hundreds of millions of years earlier than anyone had ever imagined. not long after the earth was formed. we've got it. we've got the oldest fossils. this is exciting! the oldest fossils on the planet. it relates us to our origin. i mean, this is one of the reasons for intelligent life to evolve. so, where does the life form fit in, in the story of life on earth? the earth formed just over 11.5 billion years ago, a molten mass of rock that began to cool. not long after that came the first oceans which spread all across the planet. it was right at the bottom of those primordial lotions that some of t

pallab ghosh reports. are related, and how they evolved. but a new reassessment published in thejournal nature, which suggests that that theory which has lasted 130 years, maybe wrong. the current theory is that there are two main groups of dinosaurs. one, which includes the stegosaurus, and another, which has two branches. the vegetarians such as the brontosaurus, and the meat eaters, such as the savage tyrannosaurus rex. it turns out that the meat eaters are in the wrong group, and should be with the stegosaurus. it also shows that the very first dinosaurs did not originate in what is now east africa, but much further north, possibly in an area which is now britain. we‘ve taken dinosaur origins, which originally were thought to be southern hemisphere, and brought them into the northern hemisphere, and it could well be that dinosaurs originated even within britain itself. what we have here is a key specimen in this analysis. and here is the fossil that led to this shock finding — a primitive dinosaur the

than four billion years ago, not long after the formation of the earth. 0ur science correspondent pallab ghosh. the discovery of some of the first lifeforms to have ever existed on earth may begin to provide some answers. they were discovered in these rocks, which were found in canada. and here it is — one of the planet's first inhabitants. it was less than the width ofa human hair, and very simple. but it ate and consumed oxygen, like we do. and, to the shock of the scientist who discovered it, the lifeforms existed hundreds of millions of years before anyone expected. we've got it. we've got the oldest fossils on the planet. this is exciting. it relates us to our origin. this is one of the reasons for intelligent life to evolve. so where does the lifeform fit in, in the story of life on earth? the earth formed just over 11.5 billion years ago, a molten mass of rock that began to cool. not long after that came the first oceans, which spread all across the planet. it was right at the bottom of those primordial oceans that some of the first lifeforms emerged, 4.8 billion years ago. cracks began

our science correspondent pallab ghosh has more. than 65 million years ago. by measuring how they changed over the years, researchers worked out how they are related, and how they evolved. but a new assessment published in thejournal nature, which suggests that that theory which has lasted 130 years, maybe wrong. the current theory is that there are two main groups of dinosaurs. one, including the stegosaurus, and another which has two branches. the vegetarians such as the brontosaurus, and the meat eaters such as the savage tyrannosaurus rex. it turns out that the meat eaters are in the wrong group and should be with the stegosaurus. it also shows that the very first dinosaurs did not originate in east africa, but much further north, possibly in an area which is now britain. we have taken dinosaur origins, which originally were thought to be southern hemisphere and brought them into the northern hemisphere, and it could well be that dinosaurs originated even within britain itself. what we have here is a key specimen in this analysi

pallab ghosh, bbc news.s in sallochy bay, on the shores of loch lomond. loch lomond, the largest inland body of water in britain, drawing in millions of visitors every year. without doubt one of the jewels in the crown of scotland‘s natural heritage. these pictures, holiday snaps from hell you might call them, record the damage that has been done in previous years. which is why the park authority wants to bring in by—laws which will control wild camping in the busiest areas. this is a kind of typical example of people coming along and trying to get themselves some firewood that‘s maybe a bit bigger than they‘re able to tackle. the sheer volume of folk can end up being damaging in itself. if you mix that with a bit of anti—social behaviour then sites can become degraded quite fast. we‘ve got some of the most wonderful landscapes you can imagine here and you can see why people come and enjoy it, so we want the sites to match that while they‘re here. from today anyone wild camping in managed areas along the sho