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→Sperm whales and the candle industry: removed repeat sentence
== Sperm whales and the candle industry ==
== Sperm whales and the candle industry ==
In the 19th century sperm whales were prized as a source of spermaceti - a liquid in a cavity in front of the skull and believed to be used as a resonator for its sonar - used in the making of sopecialist, high-class candles (for places such as churches where tallow candles were deemed inappropriate); and [[ambergris]], a fatty-substance created in the intestines by squid beaks, and used as a base in the perfume industry. Spermaceti is not, in fact, the sperm of the sperm whale, which would have been difficult to harvest, but a material found in its brain cavity.
In the 19th century sperm whales were prized as a source of spermaceti - a liquid in a cavity in front of the skull and believed to be used as a resonator for its sonar - used in the making of high-class candles (for places such as churches where tallow candles were deemed inappropriate); and [[ambergris]], a fatty-substance created in the intestines by squid beaks, and used as a base in the perfume industry.
==References==
==References==