Wait, how is this claim extraordinary? There's a proposed mechanism that doesn't seem to contradict anything we had previously thought we knew about biology, its not like researcher is claiming that he's found evidence for Lamarkian evolution or something.
We ask for extraordinary evidence for claims that are in and of themselves extraordinary. Simply having extraordinary implications doesn't warrant needing extraordinary evidence, though we should always be hesitant to rely on one person's experiments whether their claims are ordinary or not.
We ask for extraordinary evidence for claims that are in and of themselves extraordinary. Simply having extraordinary implications doesn't warrant needing extraordinary evidence, though we should always be hesitant to rely on one person's experiments whether their claims are ordinary or not.