There are plenty of things that damage DNA in the test tube, some of which cause cancer. Ionizing radiation is one such thing, and the mechanism behind it is that 1905 paper. Many other examples are chemicals.
(for the curious, he's referring to Einstein's paper on the photoelectric effect, for which he won his Nobel Prize. Some consider that paper "more interesting" than general relativity, and the paper is considered an essential step in the progress from classicial to quantum physics. While very important, it bears little importance to the question of whether cell phone usage causes cancer).
It bears a lot of importance, for the reasons I mentioned earlier. But now we're just repeating ourselves repeatedly, which doesn't do anyone any good. In 20 years, when this turns out exactly like the high voltage lines cause cancer scare, we can have a beer and laugh about the whole thing. Especially about all the money wasted.
