I have proof....

I dismiss it as just speculative nonsense. It is easy and doesn't take any intelligence to make a claim for anything you can possibly imagine in a human brain and people do it all the time. That is how religion started.

There being no evidence to suggest such a civilization existed on Earth, it's become more a study to determine what kind of evidence OUR civilization might leave behind which could be discoverable millions of years from now.
I have one word for you: plastics.

[motherboard.vice.com]

So they doubt that there has been, 'civilisation' but are putting forwards a hypothesis of things that may prove it if it had happened? Well clearly if it did they were more sucessful at being sustainable than us if they have gone undetected all this time

Science at its best. If there was a pre human industrial civilization, what traces would it leave? The preservation of ruins or fossils are extremely unlikely after tens of millions of years, but there are things in the geologic record to look for. None have been found yet, but but this study may encourage scientists to look further. Seems unlikely, but certainly can't be ruled out.

Has it been peer reviewed?

It's more of a mental exercise not a study. There's no evidence to suggest there were civilizations on earth before humans.

It's all conjecture. There is no evidence for it. It's a nice little thing to ponder on a rainy Sunday afternoon, but that's it.

Whilst tens of millions of years ago, isn’t very long ago, it’s still a magnitude of time greater than the 120,000 years odd that Homisapiens have been around. It’s an even smaller amount of time before Homosapiens had anything that could be called a civilisation.

Any “evidence” in this un-cited “study”?

Highly Skeptical since there is No Fossile Evidence of the sort you would need.

I'm going to need more proof than a "study".

On Earth? If such a civilization had existed, we would have found evidence.

They are studying the question whether or not.

Bound to create conflict.

There have been hominins for a few million years, but none that could create a civilisation. I can readily accept some civilisations in the 10s of thousands of years range. Maybe a rudimentary hunter gatherer civinisation of primates about 2 million years back, I seriously doubt it though.
10s of millions of years, no way.

The Flintstones of course.

What study? Conducted by whom or what group? What did id say?

[arxiv.org]
Here is the source

It's nothing new. Theosophists have believed in such things for a long time.

How is going to change rest of my life?

What jlynn37 wrote - better than anything I could have - he's spot on.

That seems highly improbable. Evidence would great.

@DanDanDanDan -- What new study is that? Where can I find it?