How do paleontologist use known evidence to make their observations? What are 2 of their observations

Explanation:

Paleontologists are scientists that use fossil records to study the history of life on earth. They use known evidence/fossils such as bones, prints (on land or sea), dead remains to determine evidence and history of past life on earth.

Some of there observations include the use of comparative anatomy to determine possible evolution. They also use carbon dating to determine approximately how long a fossil/bone has been in existence.