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🌍 Dinosaurs, those majestic reptiles of the Mesozoic era, continue to capture the imagination of scientists and prehistory enthusiasts around the world. Particularly fascinating is the Triassic era, when the first true dinosaurs appeared. Dating from around 250 to 200 million years ago, the Triassic marks the beginning of an era in which the diversity of life on Earth expanded spectacularly after the mass extinction of the Permian-Triassic. This environmental cataclysm, one of the largest mass extinctions in Earth's history, paved the way for the emergence of the dinosaurs, which would go on to become our planet's dominant creatures.
The Triassic is divided into three periods: the Lower Triassic, the Middle Triassic and the Upper Triassic, each characterized by unique developments in both fauna and flora. It was during this period that the supercontinent Pangea began to fracture, leading to significant climatic changes that influenced the evolution of the first dinosaurs. Climates ranging from dry and arid to temperate and humid in different parts of the continent enabled a wide variety of adaptations and evolutions.
Fossils discovered in the Triassic period give us a fascinating insight into these early dinosaurs. Genera such as Herrerasaurus and Coelophysis show us agile bipedal creatures, contrasting with gigantic sauropodomorphs such as Plateosaurus, whose size and structure suggest a predominantly herbivorous diet. These discoveries are crucial to understanding how dinosaurs managed to become the dominant land animals during the Jurassic and Cretaceous, succeeding the Triassic. Studying the Triassic is essential not only for understanding the origin and evolution of dinosaurs, but also for grasping the ecological and climatic dynamics that shaped life on Earth at this time.
🔥 As a reminder, videos are released on SUNDAYS at 9:00 pm.
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💥The Triassic and the dinosaurs:
- So here we are 250 million years ago. The Permian is closing its doors, while the Triassic is opening wide.
The extinction has left deep scars all over the Earth's surface, not least in the vast ocean that covers most of the globe. Neither Pangea nor Panthalassa were spared the multiple upheavals that marked the Upper Permian.
Life seems to have stopped there.
After a few million years, however, the vegetation cover helped animals to repopulate the land.
First of all, the few survivors of the Great Extinction were given free reign to conquer larger territories on this vast land, which seemed virtually untouched by ecosystems. They settle in new ecological niches left vacant after the disappearance of previous living beings. This gives them the opportunity to diversify at will and rebuild the living world.
Rebuild, but also renew and diversify. Indeed, the surviving species are far from being the only ones to populate the earth. New species enrich the various ecosystems.
This is known as radiation or speciation. Species will evolve to adapt to their new environment and occupy the places left vacant since the chaos of the Permian.
But, before we meet these species, even if I can imagine your curiosity and impatience, we need to know what we're getting into. Before we talk about the characters in our Triassic play, we need to know the context in which they evolve if we are to understand all that's at stake.
What's the Earth like at this point in our history? What's the weather like?
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🎬 Today's program:
- 00:00 - Introduction
- 01:50 -
- 02:15 -
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