Also on Thursday, a new theory emerged about the nature of the explosives in the bombings.

A theory has emerged that explains how all of this can go on for a long time.

This is where the theory of rational expectations emerges once again.

Over the years, a few credible theories have emerged from those familiar with the project.

Taking the native dating as broadly accurate, another theory has emerged.

No theory has yet emerged as an obvious front runner, and it is likely that debate will continue.

Shortly after his death, two theories emerged about why he was killed.

But now a theory has emerged as to why women get more scared than their male counterparts.

Many theories have emerged as to why he killed himself.

Still, those suits are also likely to prove difficult to win unless some clear theory emerges.