Instead, differences in composition between warm-water and cold-water ion channels were the result of a phenomenon called RNA editing, in which special enzymes alter the structure of the RNA messenger, and thus of the final protein.

ECONOMIST: A hitherto-unknown way to evolve

"We can and will change the size, the composition, the character of our nuclear forces in a way that reflects the reality that the Cold War is over, " Bush said.

CNN: Bush suggests junking missile treaty with Russia