Shelf by Bill Chan

bchan42 — 2024-03-10 11:59:31 UTC

An extinction event that occurred approximately 443 million years ago, resulting in the loss of around 85% of marine species. It was likely caused by a combination of glaciation and a subsequent global warming event, along with changes in ocean chemistry.

bchan42 — 2024-03-10 12:00:06 UTC

An extinction event around 359 million years ago, leading to the loss of around 75% of species, particularly marine life. It was possibly caused by climate change and anoxia (lack of oxygen) in the oceans.

bchan42 — 2024-03-10 12:01:16 UTC

The most severe extinction event in Earth's history, occurring around 252 million years ago. It resulted in the loss of about 96% of marine species and 70% of terrestrial vertebrate species. The causes are debated but may include volcanic activity, asteroid impact, and climate change.

bchan42 — 2024-03-10 12:03:33 UTC

An extinction event around 201 million years ago, resulting in the loss of approximately 80% of marine and terrestrial species. It may have been caused by volcanic activity, leading to climate change and habitat destruction.

bchan42 — 2024-03-10 12:03:56 UTC

Occurring around 66 million years ago, this extinction event led to the demise of the dinosaurs and about 75% of all species on Earth. It is widely believed to have been caused by an asteroid impact, leading to environmental upheaval.

bchan42 — 2024-03-10 12:07:26 UTC

Scientists believe Earth is undergoing a sixth mass extinction event, characterized by a rapid loss of biodiversity across multiple ecosystems. Human activities, such as habitat destruction, pollution, climate change, overexploitation of resources, and introduction of invasive species, are major contributors to this ongoing extinction crisis.