FIRST ORGANISMS ON LAND

FIRST LIFE ON LAND

From the very important and good for me BBC documentary:Walking with Monsters we may thing that the arthropods are the first creatures to went out of the water on to dry land,but this is fault.The first animal to went out of the water is far more in the past unlike the Silurian Brontoscorpios.It was a worm like arthropod that lived 540 million years ago despite the 30% lower oxygen level,is called Aeshia,a strange name for creature.We haven’t to imagine it in life because is a creature that looks like very much to the fossils of Aeshia that live under the cover of darkness in many parts of the tropics inside rotten logs,mostly in Australia and it call as Velvet worm and it’s over like the picture.It’s look like a worm but of course,no worm have legs but is half arthropod,half worm.Aeshia lived in the water and the Velvet worm had lived here for 540 million years and have something that Aeshia might not had,it have tiny holes along it’s flanks,this give it the ability to breathe even the little oxygen that the land had.But it had to change in the next half billion years,unlike it’s half arthropod descendants this creature’s body isn’t covered by an exoskeleton but from soft skin.So that means that their body unsupported by water can’t grow any bigger and they mustn’t dry out for long or they died,they have to stay in damp landscapes.But the scorpions that came later had exoskeleton,so they can live far from water for long without died,the arthropods with this kind of protection they follow the scorpions and went out of the water,so arthropods came more and more out of the water and they became more successful than ever.In the eastern coast of Scotland you may find clues in how successful they became.They are bases of trees that were alive 335 million years ago at a period called Carboniferous,it is the golden age of arthropods.This trees are ancestors of small plants like ferns,but they grew up to 30m at height.They were so many plants that they pump out oxygen and the arthropods got bigger like the 1.5m long Arthropleura,a millipede that feed as well as plants and flesh.Their descendants  today are not bigger than 0.5m long,but they have the 95% of life on land.