NASA
Nasa: Artic Sea Ice Continues to Decline
Great animation showing the transformation of Artic sea ice can be found here. Different explanations of this phenominon are also offered on this site.
PBS
Nova: If the Ice Melts
Global warming is becoming a big concern. See how it might affect the shorelines if parts of the Antarctic ice sheet melt. Diagrams of the east coast, Florida, northern Europe and southeast Asia are available.