Throughout human history, there werehave been many discoveries and inventions which have improved life on this planet.

Take the wheel, for example, a simple and seemingly insignificant contraption, which was invented so long ago.

Minor. Adding "for example" makes your point clearer, and the "so" seems out of place to me. You have used "seemingly" exactly right :)

Electricity became integral to a normal destinationlife on Earth, it has contributed much to manufacturing and operating machines.

This is a guess; I don't know what you mean by "normal destination". A destination is a place that you are travelling to.

In my view, many scientific discoveries are decent and engaggood and interesting, especially those which make our life easier and more comfortable.

Guesses. "Decent" and "engaging" are strange words here, and I'm not sure I know what you mean by them.

Nevertheless, one cannot fail to mention the existence of deadly weapons which also have been created by people.

You need a pronoun with "cannot" here. "I cannot", "we cannot". "One cannot" is what I think is closest to your meaning, but it's *really* bookish, it's the way the Queen of England speaks.

Better, if you want to keep a detached tone, to reconstruct the sentence so it's indirect. "Nevertheless, it must be mentioned that deadly weapons exist".

And to my mind, it is one ofthese are among the most negativedamaging discoveries.

In the last sentence you talked about the "deadly weapons", in plural, so the singular "it" doesn't work. "Negative" isn't incorrect or unclear, but it's strange.

First of all, you should think about why you want to be a scientist, and then, set a goal aboutrelated to achieving your dream.

You should choose the focus of sciencea science to focus on, like, what do you like more, physics, chemistry, etc., and study a lot of this subject a lot.

"study a lot of this subject" sounds like you are going to take the subject and study a large amount - but not all. Compare to "I read a lot of this book", meaning you haven't finished reading it. Better to study the subject a lot. Better still to say "*learn* a lot about this subject", or "study this subject intensely".

Using "like, what do you like" here is very colloquial. It's fine, especially spoken, but "for example, what do you like more" would usually be more appropriate. You'd separate the end of the sentence too: "for example, what do you like more: physics, chemistry, etc? And then study this subject a lot"

If you really want to be a scientist, you will do anything to become the person you likone.

"become the person you like" sounds more like you're going to dress up as your partner, it's a strange thing to say. You could say "become the person you'd like to be". But I think it's best to just refer back to the scientist you already mentioned.

To my way of thinking, it is wrong, and I believe that discussion about it is needed discuss.

or "we need to discuss it".

On the one hand, I can understand these parents, because they are just trying to protect their children from some dangerous things on the internet, like cyberbullying, identity theft, or online- predators.

You're only talking about some parents, the parents who don't like the internet, so the pronoun helps. "I can understand parents" says you understand *all* parents, in general. Alternatively, you could restrict meaning with a subclause: "I can understand parents who feel this way".

However, on the other hand, a child, maybe, have some problems in real life, and he or shbe trying to avoid these,m by hiding on the internet, where he or sthey can have friends who support hithem and trying to help.

A little messy. "He or she" isn't rare but it's awkward to use, and here inconsistent when you switch to "him" at the end - should be "him or her". But it's easier to just use "they".

"However, on the other hand" is very common but sounds a little excessive. "On the other hand" already means "however", so it's like you're saying it twice. "But on the other hand" is fine, or just "On the other hand".

And, when parents limit their children in using's use of the internet, they can do something wrongmight be making an error and only hurting themir children.

That's probably what you mean. Be careful of the pronouns here: I think "they" meant the parents and "them" meant the children. But "they" and "them" usually refer to the same subject. It's a VERY common thing for natives to do this, but it is better to avoid it. So I change "them" to refer to the children explicitly.