alt Hacker NewsQuantify the belief that humans are biased toward sensationalism? No, I have no idea how to do that. Actually you could make an argument that it's a bit circular, that "sensationalism" is defined as the kind of ideas that humans are biased towards and which are therefore more able to cause a "sensation".
But if you don't see how people yearn to believe in big dramatic things like conspiracies, aliens, bigfoot, or even simple narratives about single people changing the course of history, and how they only accept the complicated and/or boring reality with conscious effort, then, well, you seem to be living in a better universe than I am.
Unfortunately, you also sometimes throw out explanations like "they did X in substantially the same way as their descents were doing X up until the late 1800s" or "they used it for Y, just at it was used at other sites throughout the world."
At least in the case of things like migrations, we're starting to get overwhelming genetic evidence.