The use of "some" and "may" in titles always bothers me. Seems like there should be more concrete language available to state the point the article is attempting to make.
It's just a consequence of the scientific mindset -- scientists are aware that today's results are always provisional, someone may come along tomorrow with a new discovery that overturns them. So they tend to avoid making definitive statements like saying something applies to all things, or that some thing is, favoring less definitive statements like something applies to some things, some thing may be, etc.
Accurate without overpromising.