Yet volatility is real, the advocates of fair value reply, and dangerous if hidden.

ECONOMIST: Accounting

It finds microorganisms that have hidden themselves in hot, dangerous enkvironments and steals their most valuable chemicals.

FORBES: Invitrogen Deal Proves Diversa's Worth

"We know that this is the most difficult part because the terrorists are hidden there and can still carry out extremely dangerous operations, for neighbouring countries and Mali, " he said.

BBC: French-led troops secure hold on Timbuktu