That gene went through a selective sweep.

This changes how we think about evolution and, in some respects, disease. That's the part that's exciting.

If you think of the genome as the book of life, then the differences people have been looking at over the past 10 years have been typographical errors. But what we are looking at are redundancies in the text -- places where entire pages [genes] have been reprinted multiple times, or the page is missing.

There's no smoking gun in this study. The answers are all in there — but we're just not smart enough to figure them out yet.

We're saying it's always darkest before dawn.

It's still a little early to start looking. Even retailers can only go so far ahead of schedule.