👉 Promemorial is a term used in the context of history, specifically referring to the period of time during which the Earth's atmosphere was primarily composed of gases and dust. During this period, the planet underwent significant changes as the atmosphere became thinner and more dense due to its rapid cooling. This change culminated in a catastrophic event called the Great Oxygenation Event (GOE), where atmospheric oxygen levels plummeted to levels that were below 1%, leading to the extinction of all marine life on Earth
