A number of scientists with greatly different backgrounds can come up with completely different assessments. The discussions or controversies are endless. Once a year we try to bring the most important discoverers together to exchange their experiences and knowledge.

The passionate controversies of one era are viewed as sterile preoccupations by another for knowledge alters what we seek as well as what we find.

The most savage controversies are about matters as to which there is no good evidence either way.

Wikipedia is just an incredible thing. It is fact-encirclingly huge and it is idiosyncratic careful messy funny shocking and full of simmering controversies - and it is free and it is fast.