The Cambrian explosion is the relatively short period in which many complex life forms appeared on the planet. It shows the sudden coming into existence of practically all known animal phyla. The Cambrian stratum also shows that there was a sudden and massive destruction of life because of the preservation of large quantities of fossils.

The Cambrian explosion shows the appearance of all known phyla in a relatively short timespan. With the Cambrian explosion for example brains appear, which are considered the most complex organs of life. The Cambrain explosion is an explosion of specified complexity.

Darwin himself warns that an event like the Cambrian explosion invalidates his theory. In Darwin's time there was little knowledge from the period before the Cambrian explosion. Darwin expected older strata to show fossils that would explain the sudden appearance of life in the Cambrian. This is not the case, the Pre-Cambrian strata contain only few life forms. Thus the gap is real. Still, the evolutionists assume that there was a period of evolution happening before it, from simple to complex life forms. There is no true science to support that claim and it is primarily based on the evolutionary worldview that presumes evolution beforehand. Another example of worldview over science.

The Precambrian strata have been thoroughly examined by scientists since Darwin, but they contain very few fossils with explanatory power. The sudden appearance of phyla in the Cambrian poses a serious threat to his theory of slow and gradual evolution. There are no intermediates, except in the minds of evolutionists. The argument that soft-bodied life forms do not fossilize well is contradicted by the fact that even bacterial life has been found in the form of fossils. But of course, bacterial life prior to the Cambrian explosion doesn't explain the explosion of complex life.

After the Cambrian explosion no new phyla emerged. Only microevolution caused variety within the existing phyla. This clearly contradicts macroevolution theory which states that new phyla emerged from the existing phyla. Of course Niles Eldredge talks about paradigm paralysis. Together with evolutionist Stephen Jay Gould he invented punctuated equilibrium which contradicts Darwin's gradual evolution.

TalkOrigins is a fanatic evolution club sponsored by mainstream science which tried to explain it. However...
1. There is nothing seemingly about this sudden appearance. It was definitely sudden in the supposed evolution of billions of years. Nobody says it was the origin of complex life. But it was an explosion of specified complexity. This is certainly not in accordance with slow and gradual evolution as proposed by neo-Darwinism.
2. Transitional fossils are based on metaphysics, not science.
3. Plants existed before the Cambrian explosion. Algea for sure. But all known animal phyla appeared with the Cambrian explosion.
4. It is not. Scientists agree upon the timespan depending on what they want to include.
5. Anybody can make up just-so stories based on wishful thinking.
6. Of course, extinction events caused certain types to disappear. Living fossils prove that there was no evolution. Lazarus taxa show that so-called extinct life forms are still alive today. And of course microevolution caused variety.

TalkOrigins doesn't explain, it tries to explain away. This merely understates the problem for evolution theory.

The facts are that many phyla appeared in a relatively short period of time and that with time many phyla died out. This is of course not in line with what evolutionists have always claimed. There are many more burning scientific questions for evolution than there are satisfying scientific answers from evolution. That's due to the fact that science simply contradicts evolution.