There's also, of course, the low-level method, which is--you've heard of Dumpster diving and people going through mailboxes and that kind of thing.

NPR: Understanding Identity Theft

Moreover, as the chart shows, the rate of change has speeded up over the course of that period. (The sudden fall-off at the end is caused because the linkage-disequilibrium method cannot easily detect very recent mutations, rather than by a sudden reduction in the rate of evolution.) The researchers put this acceleration down to two things.

ECONOMIST: Human evolution