Sentences with phrase «longstanding mystery of their origin»

The longstanding mystery of their origin, which is further compounded by the fact only about two dozen such events have ever been detected, has spawned a plethora of scientific (and some that sound not so scientific) theories, including the occasional speculation that aliens are responsible for them.

The longstanding mystery of their origin, which is further compounded by the fact that only about two dozen such events have ever been detected, has spawned a plethora of scientific (and some that sound not so scientific) theories, including the occasional speculation that aliens are responsible for them.

The longstanding mystery of their origin, which is further compounded by the fact that less than two dozen such events have ever been detected, has spawned a plethora of scientific (and not so scientific) theories, including the occasional speculation that aliens are responsible for them.

Not exact matches

Those atoms» origin in the ozone layer might also help explain a longstanding mystery about some grains of lunar soil brought back by Apollo astronauts.

«The origin of the knee and other features remain longstanding mysteries,» Seo said.

The work solves a longstanding mystery about the origin of new...