According to Facebook Research -
UNICORN: A System for Searching the Social Graph.
https://research.fb.com/publications/unicorn-a-system-for-searching-the-social-graph/
Happy Days!
China spawned 97 unicorns last year.
Chinese UNICORNS
https://www.bloomberg.com/news/articles/2019-01-28/china-creates-fewer-tech-unicorns-as-economy-slows-down
Silicone Valley Unicorn Bubble.
https://www.theguardian.com/commentisfree/2019/feb/03/if-silicon-valleys-unicorn-bubble-bursts-what-legacy-will-it-leave
That is McNasty.