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Q: What made scientists think that Neptune existed before?
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Do scientists think living could have existed on neptune?

no


What do scientists think existed before the formation of the universe?

"Scientists think" that there is no such thing as "before", because the big bang was the beginning of time as well as space. Yes, I agree with you. I don't understand it either. I'm only telling you what I have read.


How many craters do scientists think Neptune has?

Scientists know, not think, Neptune has zero craters.Neptune is a gas giant. Gas giants do not have a solid rocky surface. Therefore nothing can impact against the planet to form craters.


Why do some scientists think it is raining diamonds on neptune?

I don't think I'm correct but I think it's just their opinion.


What planet do scientists believe life may once have existed on?

mars. now tell me why they think that?


Did Neptune the planet ever exploded before?

I don't think so. It might've, but I don't think so.


What made scientists think that neptune must exist?

Go to Google and search solar system webquest, and the answer should be on the first one. Then when you get on the site there should be pictures of each planet. Then click Neptune, and it practically tells you everything important about Neptune.


What steps do scientists take before they develop a hypothesis?

they think really hard..


When do scientists think that life started?

Scientists currently think that life got started between 3.8 and 3.5 billion years ago, probably less than a billion year after the formation of the Earth. It is certain that life existed by 2.7 billion years ago.


What is the difference between mars and Neptune?

Unfortunately Mars is cold, but Neptune is extremely cold. Therefore Mars is so likely like Earth that scientists think there might be living things on Mars. Neptune is more likely impossible to live on therefore you will need quite a lot of the technology to live or even go to Neptune. Edit: Also Mars is a solid rocky world, whereas Neptune is mainly gas, fluids and so on.


Why do scientists think RNA may have evolved before DNA?

because RNA depend to DNA.


Does Triton have Volcanoes and Earthquakes?

Scientists think that Titan may have cryovolcanoes, which erupt cold material.