Chapter 21: Unicorn
page 307: Unicorn's horn was the Viagra of its day. Rhino horn is the "natural" Viagra of ours. In February it was reported that a rhinoceros has been killed every 11 minutes since the beginning of the year. In April the last 15 rhinos in a Mozambique park were killed by poachers.
page 308: An informative post on narwhals today at Why Evolution is True.
page 308: Sawfishes are arguably the most threatened family of marine fishes in the world. See: Exaltation to extinction.
page 311: humans...kill many tens of millions of sharks every year. See this graphic.
page 311: obligate metaphorists. Robert Sapolsky elborates here.
This is the twenty-second in a new series of notes and comments on chapters in The Book of Barely Imagined Beings. It appears around the time of the US publication, and adds to an earlier series that appeared around UK publication.