Replication crisis

The replication crisis (or replicability crisis) refers to a methodological crisis in science, in which scientists have found that the results of many scientific experiments are difficult or impossible to replicate on subsequent investigation, either by independent researchers or by the original researchers themselves. Since the reproducibility of experiments is an essential part of the scientific method, this has potentially grave consequences for many fields of science in which significant theories are grounded on experimental work which has now been found to be resistant to replication.