Summary of Linha do tempo dos primeiros organismos vivos no planeta Terra

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The YouTube video "Linha do tempo dos primeiros organismos vivos no planeta Terra" (Timeline of the First Living Organisms on Earth) outlines the emergence and evolution of life on Earth. Around 3.85 billion years ago, the first simple, cellular organisms appeared. Around 1.5 billion years ago, cyanobacteria began producing photosynthesis, leading to the accumulation of oxygen in the atmosphere. Around 530 million years ago, the first vertebrates emerged in the oceans. Around 400 million years ago, the first plants appeared, and the ozone layer formed, allowing plants to spread. Around 350 million years ago, amphibians and reptiles were the first organisms to leave the oceans for land. Around 225 million years ago, the first terrestrial vertebrates appeared, feeding on plants. These species multiplied rapidly, and around 200 million years ago, the first dinosaurs emerged, believed to have descended from lizard-like ancestors. Dinosaurs existed for approximately 65 million years but went extinct around 65 million years ago due to an asteroid impact, resulting in widespread destruction and the disappearance of plants and food sources for animals.

• 00:00:00 In this section of the YouTube video titled "Linha do tempo dos primeiros organismos vivos no planeta Terra" (Timeline of the First Living Organisms on Earth), the narrator discusses the emergence of the first living organisms on Earth approximately 3.85 billion years ago. These early organisms were simple forms of life consisting of only a few cells. Around 1.5 billion years ago, oxygen began to accumulate in the Earth's atmosphere due to photosynthesis produced by cyanobacteria, a type of alga. Around 530 million years ago, the first vertebrates emerged, populating the oceans. Around 400 million years ago, the first plants began to grow, and oxygen in the atmosphere reacted to form the ozone layer, a protective barrier against solar radiation. This allowed plants to spread across the Earth. Around 350 million years ago, the first organisms to leave the oceans for the land were amphibians and reptiles, which soon evolved into various forms of life. Around 225 million years ago, the first terrestrial vertebrates appeared, feeding on plants. They multiplied rapidly, and around 200 million years ago, the first dinosaurs emerged. Scientists believe they descended from lizards that were growing and multiplying in different species. The dinosaurs existed for approximately 65 million years but disappeared along with other species around 65 million years ago due to the impact of an asteroid that caused widespread destruction, including earthquakes, tsunamis, and volcanic eruptions. This led to acid rain falling on the entire planet, blocking the sun's rays, causing the plants to disappear, and leaving animals without food.