With the recent technologies and scientific innovations we have now on studying and providing detailed analyses of the polar ice cores, it is roughly estimated that we could profile the ancient climate the Earth had in a time period as early as 800,000 years in order to explain the most recent climate change.
There won’t be most likely. Many glaciers are already melting at a fast pace already. They aren’t being formed either just melting. They’re shrinking significantly and will probably be gone soon because of climate change. Even glaciers that have been around for millions of years a melting away. :(
Some of this you have to do on your own
