Video in the How Creationism Taught Me Real Science series.
Claim CD701: The earth's magnetic field is decaying, indicating a young earth
Claim CD701.1: Cowling's theorem disproves dynamo theory of earth's magnetic field
Brief responses in the Index to Creationist Claims in the TalkOrigins Archive.
Video in the How Creationism Taught Me Real Science series.
Article by Dave E. Matson on the Secular Web site. Also available in the TalkOrigins Archive.
Population (and magnetic fields) proves young Earth
Video by potholer54. Uses humour. (Note: starts with excerpts from creationist videos.)