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There have been five big mass extinctions in Earth's history – these are called the "Big Five". Understanding the reasons and timelines of these events is important to understand the speed and scale of species extinctions today.
31 Αυγ 2024 · These five mass extinctions include the Ordovician Mass Extinction, Devonian Mass Extinction, Permian Mass Extinction, Triassic-Jurassic Mass Extinction, and Cretaceous-Tertiary (or the K-T) Mass Extinction.
In the last 500 million years, five great mass extinction events have changed the face of life on Earth. We know what caused some of them, but others remain a mystery. The Ordovician-Silurian mass extinction occurred 443 million years ago and wiped out approximately 85% of all species.
22 Σεπ 2023 · NSR: What are the causes and triggers of past mass extinctions? Are all mass extinctions catastrophic? And what are the consequences impacting on the evolution of Earth life?
26 Σεπ 2019 · What are mass extinctions, and what causes them? In the last 500 million years, life has had to recover from five catastrophic blows. Are humans dealing the planet a sixth?
17 Μαΐ 2021 · From greenhouse gas emissions and ozone depletion to deforestation, plastic pile-up and the illegal animal trade, humans have actively stripped the world of some species and threatened many more....
1 Φεβ 2020 · Enigmatic catastrophic events, involving mass extinction of life forms, have been recorded several times in the Earth history. In many cases, the causes and mechanisms of these major and minor mass extinctions can be traced via the fossil record.
