From a goggle. Based on the very old zircon rock from Australia we know that theEarth is at least 4.374 billion years old. But it could certainly be older. Scientists tend to agree that our little planet is around 4.54 billion years old—give or take a few hundred million.May 16, 2014 How Do We Know the Earth Is 4.6 Billion Years Old? | Smart News ... https://www.google.com.au/url?sa=t&source=web&rct=j&url=http://www.smithsonianmag.com/smart-news/how-do-we-know-earth-46-billion-years-old 180951483/&ved=0ahUKEwie59ixnbfTAhVGKJQKHf2iDTkQFggnMAI&usg=AFQjCNHI4kFvi8axlnB6YEffEfb2pZL3EQ
I don't seem to be able to get that link to work so you will have to take it simply as an acknowledgment that it not my words. Alex
https://geomaps.wr.usgs.gov/parks/gtime/ageofearth.html At least five different and independent calculation methods, all of which pretty much agree.
This bears repeating. Like with a lot of astrophysical science, no one measurement is considered certain. What happens is, we have multiple techniques that provide ranges - they each individually put a constraint on the age - either 'no younger than' or 'no older than' - or, sometimes, both. So, one method might constrain the Earth to be, say, no younger than 4 billion years, but could be older, whereas another method might say no older than 5 billion years, but could be younger. Then we use other methods that further narrow it. when we get a half dozen methods that all agree, we conclude that we have a pretty good idea of the Earth's age. But it is always changing by a little. A few million years either way, as we refine our tests. Those constraints still apply though. The Earth's age will never be 3 billion years, or 7 billion years. We're just fine-tuning it now.
Yeah but it'll fall on deaf eyes. Saint will just dismiss it as sciencey-double-talk and then assert that we're all evil.
Sure we do: 4.54 +/- 0.05 billion years. It is not just speculation. Perhaps you should stick to posting in the religion section?
You can live in your fantasy , if it makes you happy . thinking that we know. Watch out our knowledge might change within one or more years.
It does not seem to be fantasy that the ratios of lead to uranium in the oldest minerals suggest an age of >4 bn years. Or do you think this has been made up? Details here: https://en.wikipedia.org/wiki/Age_of_the_Earth Don't forget we are in the hard science sections here. So if you claim it is fantasy, you should be prepared to offer some evidence for your contention. Incidentally if your religious convictions are the stumbling block here, you might find the way this link approaches the subject more appealing: http://godandscience.org/youngearth/age_of_the_earth.html
What exactly makes you think we don't have a good handle on the age of the Earth? What evidence or argument do you have that our number is not accurate?