In Lake Matano, they found that green rust played a dominant role in taking up nickel.

MSN: What green rust did long ago to the big blue ocean

Sunnis once played a dominant role in the insurgency.

CNN: U.S. deaths in Iraq down 66 percent from last year

Hedge fund managers, who have played a dominant role in pushing market-oriented school reforms, like nonunionized charter schools, have had their comeuppance as improving achievement has proven far more difficult than they anticipated.

FORBES: An End to the Education Reform Myths