5 पल, जब दुनिया खत्म होने वाली थी The 5 Craziest Extinctions Ever

An extinction event is a widespread and rapid decrease in the biodiversity on earth, also known as a mass extinction or biotic crisis. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms. A mass extinction is usually defined as a loss of about three quarters of all species in existence across the entire Earth. At least five mass extinctions have been identified in the fossil record, coming at or toward the end of the time.

Here Are 5 Of The Most Extinctions Ever The earth has been
1. Devonian extinction
2. The triassic extinction
3. The k-t extinction
4. The ordovician mass extinction
5. The permian extinction

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Видео 5 पल, जब दुनिया खत्म होने वाली थी The 5 Craziest Extinctions Ever канала The World Adventures हिन्दी