River systems build and branch because of the balance of flow through them and lateral pressure on them.

FORBES: Not Far From The Tree: Ray Kurzwiel And The Verticality Of The Silicon Valley Mind

U.S. Secretary of State Colin Powell on Tuesday wrapped up a four-day tour of Japan, China and South Korea during which he lobbied Asian leaders to support a multi-lateral approach to pressure North Korea to abandon its nuclear ambitions.

CNN: N. Korea warns of nuclear conflict