How to find science in the Internet

[Tero]

If it says Daily Mail or Booker as author
http://www.dailymail.co.uk/sciencetech/ ... l-age.html
that is a person paid to write with certain conclusions.

If you want facts, only two places are generally reliable
https://www.wikipedia.org/
https://scholar.google.com/
which leads to

http://www.sciencedirect.com/science/ar ... 9104000150

[Tero]

The science manipulated by Dailymail appeared in a reputable journal:
http://www.nature.com/nclimate/index.html

However, the climate of the past is measured by multiple tools. Tree rings are just one.
https://en.wikipedia.org/wiki/List_of_l ... ,000_years