I agree entirely with everything. It likely was the journalist (but still, this is Rolling Stone, not National Geographic - there was an obviously nonscientific audience that this was aimed at). And indeed, Scientists should be free yo make mistakes, revise their hypothesis and change their stance in light of new data, findings, theories etc. That's necessary for progress to be made. But it does make it slightly hard to swallow comics like that above which show anyone who doesn't believe everything a 'scientist' says as being some sort of intentionally ignorant idiot - scientists make mistakes too, and that's fine.