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Buzz Bloom
Gold Member
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Sorry. I lost the text of the post while trying to edit it. I will abandon this for a while.
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Do you have a "history" entry at the bottom of the post (next to "report")? If not, it is probably available to mentors only.Buzz Bloom said:Hi mfb:
Thanks much.
I did not know how to recover the text from edit history. Can you explain the procedure?
Regards,
Buzz
Hi mfb:mfb said:Do you have a "history" entry at the bottom of the post (next to "report")? If not, it is probably available to mentors only.
Hi phinds:phinds said:12 hours a day for the early spin is what I've read before, 2 hours is not and seems unlikely. That statement is anecdote & opinion though so take it with lots of grains of salt.
Those are both inferences that I'm not willing to go to. They could be right, but I don't know that.Buzz Bloom said:Hi phinds:
The text in the Sci Am article was ambiguous, but since it is impossible for the 2 hr day to be after the moon formed, do you think it is also unlikely to be the Earth's day before the Moon formed? If so, do you interpret this article as evidence that Sci Am is not a reliable source of scientific information?
Regards,
Buzz
That is a browser function, the forum does not mess around with native browser functions. Ctrl+Z reverts whatever you did last in most browsers.Buzz Bloom said:BTW: I think what happened is that while I was editing I was using backspace to remove some text, and
I'm guessing that I may have accidentally hit a special key, e.g. Ctrl, and that combination erased all my text in the edit area. I think it would be a useful feature to be able disable the functions that Ctrl (and other special keys) launch.
"Early Earth: A Rapid Spin Through History" is a scientific concept that describes the formation and evolution of the Earth billions of years ago. It includes theories and evidence from various fields such as geology, astronomy, and biology to understand the processes that shaped our planet in its early stages.
The Earth is estimated to be around 4.54 billion years old. This age is determined by radiometric dating of rocks and meteorites and is supported by evidence from various scientific fields.
The early atmosphere of Earth was very different from what it is today. It consisted primarily of gases such as methane, ammonia, water vapor, and carbon dioxide. There was also no oxygen present in the atmosphere until the emergence of photosynthetic organisms around 3.5 billion years ago.
The exact origin of life on Earth is still a mystery, but scientists have proposed several theories. One theory suggests that simple organic molecules formed in the early oceans and combined to form more complex molecules, eventually leading to the first living cells. Another theory suggests that life may have originated from chemical reactions in hydrothermal vents on the ocean floor.
The continents on early Earth formed through a process called plate tectonics. This involves the movement of large pieces of the Earth's crust, called tectonic plates, which collide, separate, and move over time. Through this process, the continents formed and changed shape over millions of years.