Time Spiral

Posted on July 2, 2024  •  1 minutes  • 144 words

图文来源自：nasa. copyright: Pablo Carlos Budassi

What’s happened since the universe started?The time spiral features a few .At the spiral’s center is the , the place where , as we know it, began about 13.8 billion years ago.Within a few billion years , then formed from atoms, from stars and gas, formed, soon followed by , about 4.6 billion years ago. begins about 3.8 billion years ago, followed by , then within a billion years. About 1.7 billion years ago, on Earth began to flourish. about 500 million years ago, and began walking on land about 200 million years ago. first appeared only about 6 million years ago, and made the only about 10,000 years ago. The time spiral illustrated stops there, but human might be added, which started only 75 years ago, and useful began to take hold within only the past few years.