Thanks for the info Hacky.
I had always thought/believed that athiests were people who just ruled out the existance God completely, which is sometimes understandble when taking into account the hyprotics who call themselves Christians, and those mouthing of rubbish like the flat earth.
I thought agnostics were people who sat on the fence, a bit like having 2 bob each way bet.
Science just tends to take probability and testifiability. The reason science doesn't incorporate God is because you can't test for God. Everything else in the Universe including the Big Bang leaves traces that can be tested.
In regards to agnosticism, atheism, etc, it's all different depending who you ask. But the ones that generally defined modern atheism and agnosticism went with a scale. The scale can vary but the basics of it is that you have:
1) Gnostic Theism - 100% belief God exists
2) Agnostic Theism - believes in God but not 100% that God exists
3) Agnostic Atheism - doesn't believe in God but not 100% sure God doesn't exist
4) Gnostic Atheism - 100% belief God doesn't exist
2 and 3 are the most honest, most Christian religions require 1, 4 is just completely dishonest and only generally used by anti-theists who live in their mum's basement.
That's a simplistic scale though. Usually the scale is larger. Richard Dawkins for example (evolutionary biologist, well know for being an anti-theist, and well known for his thoughts on Atheism) uses a 7 point scale with 1 being 100% certain of God, 7 being 100% certain God doesn't exist.
But Dawkins being a scientist and understanding probability, rates himself as a 6. He's pretty sure God doesn't exist but he can't be 100% certain.