Season 2, Episode 2 of The Wild podcast with Chris Morgan
It started as a glacier. Then, about 13,000 years ago, it was a trickle, then a stream, and eventually a rushing river meandering through the Olympic Peninsula. For thousands of years, life thrived off the ecosystem served by the Elwha River that fed into to the Strait of Juan De Fuca.
Then it stopped.
LINK (via: KUOW)