Before the Dinosaurs: The Mysteries of the Lost Age of Ediacaran Creatures | Documentary скачать в хорошем качестве

Before the Dinosaurs: The Mysteries of the Lost Age of Ediacaran Creatures | Documentary

🌍 Since everything has a beginning... What were the first creatures to live on Earth? It's just one of many seemingly unanswerable questions. Since the appearance of life 3.8 billion years ago, life on our planet has remained in the state of a simple organism for billions of years... until the first complex life forms appeared. If you've ever heard of the Cambrian explosion, you'll know that it's an intriguing phenomenon, due to the huge diversification of life, even though before the Cambrian, there were virtually no multi-cellular animals. And for a very long time, the transition from the Precambrian microbiotic world to the appearance of the Cambrian fauna remained a mystery. So what happened between the Precambrian and the Cambrian? 🔥 As a reminder, videos are published on SUNDAYS at 6pm. ------------------------- 💥 The Fascinating Ediacaran Period: It's 1946 in Ediacara, a mountainous region in South Australia. Buried and well-preserved fossils are discovered in rock strata dating back hundreds of millions of years and belonging to no proven geological era. This exploration is full of surprises. At first glance, there's nothing special about the rocks of Ediacara. Except that they tell the story of the Earth in chronological order. Thanks to these rocks, we've been able to echo the questions that have remained unanswered until now, notably those linked to the origin of life on Earth. In the meantime, analyses are being carried out to pinpoint the exact era of the geological formations and determine the age of the newly-discovered fossils. It should be noted that similar organisms had already been spotted elsewhere before, but at the time they were attributed, without much conviction, to the Cambrian fauna. Stratigraphic, paleontological, relative and radiometric dating studies, combined with examinations of the organisms discovered at Ediacara, revealed that they did not originate from the Cambrian, but rather from an earlier period. The chemical composition, texture and stratification of the rocks clearly indicated that the geological formations examined dated from -635 to -541 million years BC. What if we had just learned of an unknown period in our past, between the Precambrian and Cambrian eras? We know this period today as the Ediacaran. A recently-discovered era, yet it embodies the very birth of life on Earth. The fossils discovered at Ediacara in Australia date back to the end of the Precambrian super-eon, the first and longest period in Earth's history, spanning 4 billion years. It's also the least known, as there are very few direct testimonies of this remote era. With the discovery of the Ediacaran, we have succeeded in dusting off the vestiges of the past and unlocking the mystery of the Precambrian. In 1957, as the fossil study continued, a momentous event occurred at Charnwood, England. Among the rare and protected species found in the forest's geological formations was the fossil Charnia Masoni. The latter visibly resembled fossils previously spotted in South Australia, notably in the Ediacara shales, and in Namibia in the 1930s, which then seemed devoid of any trace of life. ------------------------- 🎬 Today's program: 00:00 - Introduction 04:03 - Before the Ediacaran 18:50 - Beginning of the Ediacaran 27:08 - Ediacaran animals 43:35 - Ediacaran flora 50:07 - Ediacaran creatures' means of transport 57:02 - Ediacaran continental evolution 01:14:55 - A mysterious mass extinction.... This channel is an official affiliate of the ORBINEA STUDIO network.