P.O. Box 98199 Washington, DC 20090-8199 The famous Cambrian
Explosion- a rapid diversification of animal groups about 550
million years ago- assumes a rather diminished significance when
mapped to the full Tree of Life. update: yes, I made the diagram
myself, by modifying this. That’s a very nice illustration to
put it in perspective. Thanks! I have briefly seen videos on
youtube about the subject of the cambrian explosion, And I had a
question burning in my head. Why was the cambrian explosion a
threat to the darwinian theory? Maybe, the cambrian explosion is
just a metaphor for the evolution and advancement of new forms
with complex body parts that simply are modified ontogenetically
through natural selection and mutation. The reason why the
Cambrian event may be problematic for Darwinian Evolution is
that within canonical Darwinian theory is the assumption that
phylotypic change occurs gradually, and is selected at each
change. For the changes that occurred around the Cambrian Event,
hundreds of millions