Some interesting things about science

In the world of scientific research, the highest quality evidence  are meta reviews, which are methods to contrast and combine results from a wide swath of peer-reviewed studies which may be useful in identifying patterns, sources of disagreement and other relationships. Since meta reviews combine the results from a larger number of studies, they can be more statistically significant. However, these reviews should be made by the scientific community only for the conclusions to be accurate.

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Blind experiments are an important tool of the Scientific method, in many fields of research. 

A blind or blinded experiment is an experiment in which information about the test is kept from the participant until after the test to avoid biases which may be intentional or unconscious. If both tester and subject are blinded, the trial is a double-blind experiment.

Blind testing is used wherever items are to be compared without influences from testers' preferences or expectations, for example in clinical trials to evaluate the effectiveness of medicinal drugs and procedures without placebo effect, nocebo effect, observer bias, or conscious deception; and comparative testing of commercial products to objectively assess user preferences without being influenced by branding and other properties not being tested.

Blinding can be imposed on researchers, technicians, subjects, and people who fund the work.

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"Scientific fact" is not quite the same as the layman's "fact". A scientific fact must always be falsifiable. Thus "scientific fact" just means "to some reasonable confidence level tested hypothesis". Let's say 99% c.l. means there is always that 1% chance the fact is wrong, and if that turns out to be so, the scientific fact has to be changed.

However, 99% is actually quite low of a number compared to how certain one can be in the data regarding many things some people want to deny, such as evolution and global warming.

Actually layman's facts and scientific facts sort of both are the same, but only science acknowledges it might be wrong! They differ in that way.

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Scientific consensus:  Consensus among the scientific community is based on data presented and therefore is evidence-based and doesn't/shouldn't rely on the opinions expressed by the colleagues in the field. The evidence comes from...

Many different fields of science all contribute to the understanding of major scientific principles, such as anthropogenic climate change–ranging across biology, geology, chemistry, and other natural sciences. Our acceptance of the safety and effectiveness of vaccines is supported by research in diverse fields like epidemiology, public health, microbiology, immunology, virology and many others. It’s not one subspecialty of science that builds the consensus, it’s several.

The experts involved in the consensus agree on standards for evidence–and this standard is ridiculously high, which is why it is so powerful.

Having researchers from many cultural and socio-economic backgrounds provides diversity that helps eliminate social biases as a cause of error. For example, the published literature on the safety of agricultural biotechnology (GMOs) has provided agreement from researchers in countries around the world from various cultural  backgrounds.

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The h-index is an index that attempts to measure both the productivity and citation impact of the published body of work of a scientist or scholar (an author-level metric).