Examlex
For an electromagnetic wave the direction of the vector gives:
Ordovician
A period in the Earth's geologic timescale that occurred about 488 to 443 million years ago, distinguished by significant biological diversification.
Cretaceous
The geological period between 145 and 66 million years ago, noted for the dominance of dinosaurs and the appearance of flowering plants.
Extinction Event
A significant loss of biodiversity occurring rapidly due to factors like climatic changes, habitat destruction, or the impact of humankind.
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