"arose suddenly from nowhere"
could you give me some examples.
All life forms are examples of this:
"The history of most fossil species includes two features inconsistent with
gradualism: 1. Stasis. Most species exhibit no directional change during
their tenure on earth. They appear in the fossil record looking much the
same as when they disappear ... 2. Sudden Appearance. In any local area, a
species does not arise gradually by the steady transformation of its
ancestors; it appears all at once and 'fully formed'."
Stephen Jay Gould, Prof of Geology and
Paleontology, Harvard University
Natural History, 86(5):13, 1977