Answer:
The universe is expanding
Explanation:
Dating Rocks and Fossils Using Geologic Methods. ... The age of the fossil must be determined so it can be compared to other fossil species from the same time period. Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.
There are three type of them nucleus,proton and lastly neutron
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If the hypothesis is tested extensively and if competing hypothesis are eliminated. Pretty much your hypothesis has to be tested many times and precisely accurate each time.