Blogpost 9: Themed Post
In this post, a themed post, write about a topic that interests you. Minimum number of words: 190
A topic that I think is quite interesting is the evolutionary history of our planet. Over time, our Earth has been very different at different times.
For instance, there was a period, I think it was called the "Ordovican" when life was still in the sea, and it was just coming onto land. Our atmosphere didn't have as much oxygen or carbon dioxide yet as now because plants were just beginning. The seas were dominated by a big variety of scorpions--sea scorpions. Some were as big as three meters in length. Fish had not yet evolved.
Later, much of the land was covered in forests--very primitive types of trees that don't exist anymore. All these trees from that time--the Carboniferous Period are the coal we have today.
We also experienced several moments of crisis and mass extinctions. One was during the late Permian Period. It lasted around 1 millions years (this crisis), which seems like a long time, but in Geology it's nothing. Around 90% of life forms became extinct. We don't even know exactly why: there seems to have been a lot of volcanic activity, and, perhaps, the atmosphere became partly poisonous.
Knowing all this and more, puts our current existence into perspective, I think. It should make us more humble, and realize we are part of a greater whole.
A topic that I think is quite interesting is the evolutionary history of our planet. Over time, our Earth has been very different at different times.
For instance, there was a period, I think it was called the "Ordovican" when life was still in the sea, and it was just coming onto land. Our atmosphere didn't have as much oxygen or carbon dioxide yet as now because plants were just beginning. The seas were dominated by a big variety of scorpions--sea scorpions. Some were as big as three meters in length. Fish had not yet evolved.
Later, much of the land was covered in forests--very primitive types of trees that don't exist anymore. All these trees from that time--the Carboniferous Period are the coal we have today.
We also experienced several moments of crisis and mass extinctions. One was during the late Permian Period. It lasted around 1 millions years (this crisis), which seems like a long time, but in Geology it's nothing. Around 90% of life forms became extinct. We don't even know exactly why: there seems to have been a lot of volcanic activity, and, perhaps, the atmosphere became partly poisonous.
Knowing all this and more, puts our current existence into perspective, I think. It should make us more humble, and realize we are part of a greater whole.
Very interesting!
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