Heated debate on evolution with brother

[Fake Messiah]

Yup no Precambrian fossils nope not at all. Of course watch creationist move the goal post. Or straight up deny there Precambrian. Or resort to Discover nothing institute and assert there not direct ancestors of modern life so they don't count. They do this of course because they know if we find even one fossil they have to acknowledge there goose is cooked. 

http://www.fossilmuseum.net/Paleobiology...ossils.htm

Well for some time scientists did think that they'll never find Precambrian fossils, because it was just so long time ago and those were soft organisms. But as XX. century rolled they were found as impressions in stone. One of the most famous findings comes from the Ediacara Hills of the Flinders Ranges of South Australia.
Some of those early organisms species even have names like Dickinsonia, Spriggina and shield-shaped possible trilobite relative Parvancorina. Now these organisms were very strange and some scientists think that because they don't seem to have central nervous or digestive tracts, which even the simplest worms have, that they were large single celled organisms.

The big WHY

It seems to me that proponents of god involvement seem to confused why there was sudden boom of bigger and multicelular organisms in late Precambrian and Cambrian period. Was it Jesus' magic? Was it aliens? But the answer is much more simple. Up to that time there Earth's atmosphere was really sparse in oxygen. So it seems that lack of oxygen have prevented early organisms to from and then forming shells or other hard parts for a very long time. Instead, for 2 billion years, the world was dominated by mats of bacteria and (much later) algae, growing in the shallow waters of the shorelines and coating the rocks.

So let me repeat this: Most scientists think that cyanobacteria produced Earth's first atmospheric oxygen, so that one day more complex animals could evolve.