Answer:
explained
Explanation:
1. the Big Bang & the universe begins to expand - about 13.8 billion years ago
2. elements such as carbon and oxygen first exist - 8 billion years before.
3.nuclear fusion begins in the Sun - Our sun is 4.603 billion years old
4. earliest life on Earth - Earth formed in early September on the cosmic calendar. Life apparently arose on Earth within less than a billion years after that, which means it was still in September (because each month on the cosmic calendar represents about 1.2 billion years).
5.dinosaurs go extinct - 65 million years ago
6. earliest humans- 40 million years ago