|
|
Magnetic Storm
|
|
|
|
Program Overview
|
|
|
NOVA explores what creates Earth's magnetic field and why it might
be headed for a reversal.
The program:
-
explains how scientists think Earth's magnetic field is
generated and describes the role of the magnetic field in
shielding our planet from radiation.
-
explores the possibility that Mars once had a magnetic field
that protected an atmosphere.
-
shows how scientists use ancient pottery and volcanic rock to
study changes in the direction and strength of Earth's magnetic
field over time.
-
presents a working model of a self-sustaining electromagnetic
dynamo thought to replicate the processes occurring in Earth's
core.
-
relates when magnetic field reversals have occurred in the past
and speculates when the next reversal might take place.
-
features a computer model showing the flipping of the poles.
-
discusses how cooling of Earth's core may be the cause of the
weakening magnetic field.
-
explores how a changing magnetic field might affect life on
Earth.
Taping Rights: Can be used up to one year after the program
is taped off the air.
|
|
