Further Reading

A. Witze. “Arctic sea ice hits record low, and keeps going.” Science News. Aug. 28, 2012.

See graphs of Arctic sea ice at the NSIDC.

A. Biskup. “Polar ice feels the heat.” Science News for Kids. April 23, 2008.

E. Sohn. “Earth’s poles in peril.” Science News for Kids. May 25, 2007.