A LIFE EXPLOSION

THE CAMBRIAN EXPLOSION

The Cambrian explosion, wasn’t a explosion of a bomb,but an slow explosion of life that took place 542 million years ago in all around the world,but what happened,why life became so complex in just a few million years?This time we will see.Before the Cambrian period was the most mysterious period in the Earth’s history,the Ediacaran era,all we know about this period came from the Ediacara hills in Australia.But 550 million years ago volcanic activity warm the climate and pulled SO₂ in the oceans and killed almost all the creatures.But 8 million years later the Cambrian explosion took place.-542mya:Nothing yet lives on land except a 10cm worm with legs,but in the oceans it’s a different story.Much creatures lived in the water like Opabinia,the first big predator Anomalacaris,Wiwaxia a primitive snail and our ancestor a 2cm fish called Pikaia,the first animal with a spine.The most of this creatures are Trilobites,there are over 20.000 kinds of them until all of them became extinct 250 million years ago.But why the organisms became in just a few million years so complex?The answer is because right before the life became so complex a global ice age ‘’Snowball Earth’’melted and some microscopic single cells that survived it start to stick together.Oxygen levels were already high in the water so the cells stick together and formed animals.By the time they grow bigger and larger until the Cambrian explosion when the creatures became more big and complex as never before,this event that never happened after it and will never happen again.He laid the evolution of every living or extinct creature today including me and you.