CHISTIANS PLEASE EXPLAIN

[Carnavon]

Carnavon, how old do you think the Earth is? Can you amuse us and explain how molecular biology and palaentology, among other sciences, conclude the following:
Simple cells (prokaryotes) appeared 3.6 billion years ago;
cyanobacteria performing photosynthesis appeared 3.4 billion years ago;
2 billion years ago--complex cells (eukaryotes) appeared;
1 billion years ago--multicellular life;
600 million years--simple animals;
550 million years--bilaterians, animals with a front and a back;
500 million years--fish and proto-amphibians;
475 million years--land plants;
400 million years--insects and seeds;
360 million years--amphibians;
300 million years--reptiles;
200 million years--mammals;
150 million years--birds;
130 million years--flowers;
60 million years--the primates;
20 million years--the family Hominidae (great apes);
2.5 million years--the genus Homo (human predecessors);
200,000 years--anatomically modern humans.

What assumptions are they using? The same ones that concluded that the rocks from Mt Ngauruhoe was dated into the millions of years whereas it was only a few years? Don't get me wrong, these scientists use the best methods they have available and come to conclusions based on a number of assumptions that will invalidate any finding if these conditions are not met. I am no scientist but is obvious even for an "outsider" like me that your assumptions, if invalid, makes your findings invalid. There are also a number of facts which mitigate against an old earth, which you are welcome to study if you would like to form an objective opinion on the matter.
And as mentioned before, what is stated in the Bible as fact has always come up trumps in the end, disproving previous opposing "facts". This gives me the confidence in accepting what the Bible says even when "science" claims otherwise.