#1 The Incredible Journey to the World Before the Dinosaurs | Earth History Documentary

🌍 Life appeared on our planet, more than 3.5 billion years ago.
This one lived periods where the ice extended until the Equator, as well as
as well as sweltering periods, without ice at the poles.
The tropical forests of these geological eras have become, today, the habitat of reindeer.
The sea level exceeded the current level by 200 m, transforming the continents into archipelagos. Then, it went down 100 m below the present level, creating stretches of land today submerged.
The continents moved closer together, only to move further apart.
The animals, 600 million years old, are like something out of a science fiction movie. Although dinosaurs are the undisputed stars of the Mesozoic period, we often forget that 400 million years before their existence, a multitude of animals preceded them.
In one way or another, their universe mutated, following climatic changes, the lack of food or the arrival of new predators. Most species failed to adapt and became extinct.
Nevertheless, they left their traces on Earth by lingering in fossils. Thus, these remains provide a detailed picture of what life was like on Earth before the dinosaurs.


🔥 As a reminder, the videos are published on SUNDAYS at 6:00 PM.


-------------------------

💥 THE EARTH BEFORE THE DINOSAUR ERA:
- Let's go back in time, far, far before the era of the dinosaurs, when
the Earth was just a huge "snowball": totally frozen, covered with glaciers from the poles to the tropics.
When volcanic eruptions produced CO₂ in large quantities, a greenhouse effect was created, allowing the planet to warm up. The ice melted and different landmasses came together to form a supercontinent called Rondinia. This one is surrounded by a unique ocean called Mirovia.

Scientists use the appearance and disappearance of animals to divide the historical periods of the earth's evolution. These periods are in turn divided into eras. This set of four eras covers the last 635 million years.
Let's begin our journey at the Edicardian period, between 635 and 542 million years before our era. This marks the end of the Upper Proterozoic era and the beginning of the history of aquatic fauna. On the bottom of Mirovia, bacteria and microbes, brought by the rain, begin to take life.
The first animal to have a shell is called Cloudina and it seemed to be widespread. Fossils were found in limestone rocks in Africa, Asia, North and South America, Europe and Antarctica.

At the end of the Proterozoic era, Rondinia broke up into several continents.
First of all, around 560 Ma, three continents broke away and became individualized: Laurentia, Siberia and the immense Gondwana.
Laurentia includes the current North America, without New England and Newfoundland, but with the north of Ireland and Scotland.
Siberia corresponds to present-day Russia.
As for Gondwana, it includes Africa, South America, Antarctica, India, China, Southeast Asia, Australia and southern Europe.
Around 520 Ma, a new continent, named Baltica, broke away from Rondinia. It is similar to Northern Europe.


-------------------------


🎬 On the program today:
- 00:00 - Introduction
- 02:30 - The appearance of primitive aquatic fauna during the Late Proterozoic era (Edicaran period) : Dickinsonia, Charnia, Cloudina, Kimberella, Tribrachidium
- 10:20 - The Cambrian explosion: the origin of current animal groups: Hallucigenia, Wiwaxia, Trilobites, Marella, Nectocaris, Opabinia, Anomalocaris, Pikaia, Myllokunmingia
- 27:40 - The Ordovician period: new explosion of aquatic animal diversity: Nautiloides, Sacabambaspis, Pterygotus, Euthycarcinoides
- 37:20 - Silurian period: emergence from the waters: Placoderms, Acanthodians, Pneumodesmus, Palaeophonus, Cooksonia
- 47:38 - Devonian period: development of terrestrial life: Eusthenopteron, Tiktaalik, Acanthostega, Ichthyostega
- 01:02:44 - The Carboniferous period: the era of insects and giant reptiles: Lepidodendron, Glossopteris, Arthropleura, Balanerpeton woodi, Hylonomus , Meganeura, Crassigyrius scoticus, Spathicephalus mirus
- 01:13:32 - Permian period: development of vertebrates: Eryops, Dimetrodon



-------------------------

🔔 If you like what I do:
❤️ SUBSCRIBE
👍 LIKE
🤳 SHARE
✍️ COMMENT