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Earth | A short recap
- 4.54 billion years ago: The Earth is formed from the solar nebula, a cloud of gas and dust left over from the formation of the Sun.
- 3.8 billion years ago: The earliest evidence of life on Earth appears in the form of microbial mats, stromatolites, and fossilized microorganisms.
- 2.5 billion years ago: Oxygen-producing photosynthesis evolves, leading to the Great Oxygenation Event and the oxygenation of the atmosphere.
- 1 billion years ago: The first multicellular organisms evolve.
- 541 million years ago: The Cambrian explosion, a rapid diversification of life forms, occurs.
- 250 million years ago: The largest mass extinction in Earth’s history, the Permian-Triassic extinction event, occurs, wiping out 96% of marine species and 70% of land species.
- 65 million years ago: The Cretaceous-Paleogene extinction event occurs, likely caused by a meteorite impact, resulting in the extinction of the non-avian dinosaurs and many other species.
- 2.5 million years ago: The Pleistocene epoch begins, characterized by cycles of glacial and interglacial periods and the evolution of Homo erectus and later, Homo sapiens.
- 12,000 years ago: The Holocene epoch begins, characterized by a relatively stable and warm climate and the development of agriculture and human civilizations.
- 1750 AD: The beginning of the Industrial Revolution leads to significant increases in greenhouse gas emissions and global warming.
- 1969 AD: The first manned landing on the Moon occurs as part of the Apollo 11 mission.
- Present Day: Human activity continues to have a significant impact on the Earth’s climate, ecosystems, and biodiversity, leading to concerns about climate change and the Anthropocene epoch.