|
400 million years ago, in the early Devonian era, over half of all the creatures in the ocean were suddenly killed. This radio broadcast explains how millenia later, one scientist has finally found the possible culprit: trees and plants that evolved to produce soil excessive in nutrients. This soil washed into the sea, producing algae plumes and ultimately, low oxygen conditions that killed many marine organisms. The clip is 2 minutes in length.
|
|
Intended for grade levels:
Type of resource:
Subject:
Technical requirements:
Real Player or Windows Media Player software needed.
Cost / Copyright:
No cost
Copyright 2005 American Institute of Physics.
DLESE Catalog ID:
DLESE-000-000-007-644
|
Resource contact / Creator / Publisher:
|
