The Quiz: Sperm whales produce what unique and rare substance?
Ambergris is a grey, waxy substance that looks like a rock when it washes up on a beach, but it is incredibly valuable. Scientists believe sperm whales excrete a fatty substance to help their stomachs digest the beaks of squids. Ambergris has been used for centuries, and today is still valued for use in perfume and pharmaceuticals. Chanel No. 5 famously relies upon the scent of ambergris.
The correct answer to this quiz is Ambergris.