But what remains unknown is why some people have longer telomeres than others.

ECONOMIST: Ageing

What remains unknown, and likely won't be answered until the BOG meeting, is if the revised valuation and the backup offer will sway votes.

NPR: AP Source: Hansen Adds Backup Offer To Kings Sale

What detail remains unknown after the trailer is who exactly the new hero will be of the game.

FORBES: Rockstar Debuts Grand Theft Auto 5 Trailer

Just what this is remains unknown.

ECONOMIST: Why women outlive men

Since it remains unknown what percentage of patients who receive Zytiga before Provenge will remain symptomatic after Zytiga therapy, there is risk that, if used before Provenge, Zytiga could shrink the eligible patient population for Provenge.

FORBES: Dendreon Takes Another Hit: This Time, Thanks To Johnson & Johnson

Much remains unknown about what motivated Mr. Loughner, who is in custody.

WSJ: Shooting Captured on Surveillance Video

What became of the van de Velde remains unknown.

FORBES: The Case Of The Art Forger Who Restored Dead Painters' Careers [Book Excerpt]

What her role would be in making that happen remains the great unknown.

CNN: Bhutto's niece wants end to 'dynastic' politics