Google is a "Black Swan" "The Black Swan is defined as a random event satisfying the following
three properties: large impact, incomputable probabilities, and
surprise effect. First, it carries upon its occurrence a
disproportionately large impact. The impact being extremely large, no
matter how low the associated probability, the expected effect (the
impact times its probability), if quantified, would be significant.
Second, its incidence has a small but incomputable probability based on
information available prior to its incidence. Third, a vicious property
of a Black Swan is its surprise effect: at a given time of observation
there is no convincing element pointing to an increased likelihood of
the event."
"There are seven species of swans in the world, all pure white except
for the Australian Black Swan and the South American Black-necked Swan.
The first European to see a Black Swan is believed to be the Dutch
sailor Antonie Caen who described the species during his visit to the
Shark Bay area in 1636. Later, the Dutch explorer Willem de Vlamingh
captured several birds on the Swan River, Western Australia in 1697,
but many people in Europe did not believe him, as at that time it was
believed that all swans were white. Three of the captured birds were
taken to Batavia, where they lived for some time. However, the species
wasn't reported again until the arrival of the 'First Fleet' in 1788.
The Black Swan was first described scientifically by Dr. John Latham in
1790.
The Black Swan is black with white wing tips and a red bill. It is a
large waterfowl, weighing about 6 kg (males are usually larger than
females) and with a wing span of almost 2 metres."
Black Swans
Black Swans