What field of science does abiogenesis fall under ? ?

Abiogenesis is its own field of science.

If you want to place it in some hierarchical structure, I suppose it could fit as a subset of both biology and chemistry.

An interesting question.

Organic chemistry?

Biochemistry?

The first replicating molecules that lead to life would probably not have been defined as living, by the standard definition. So it would not be biology in a pure sense, but it obviously goes beyond standard chemistry.

I see this like a platypus - an egg laying mammal. Between the artificial boundaries that we put on the world. Like all taxonomic categories blur into others at some point, biology, chemistry and physics blur together at points.

Actually, it is all physics. Chemists just ignore what the electrons, protons and neutrons are doing and think in terms of atoms making up molecules - but it is really still physics under that shell. Likewise biologists move up a level and think in terms of molecules making up biological structures. But it is still chemistry under that shell, and still physics below that.

When you get right down to it EVERYTHING is quantum physics. Which is a scary thought.

Biology.

Biochemistry makes sense.

@Kissthepilot: Abiogenesis is hardly "magic". Amino acids can be created remarkably easily, and from there all you have to do is wait a few million years for a very simple, self-sustaining pattern to emerge.

religion is the fairy tale some dude didnt just poop us out the sky and create life. Who created god if lif doesn't just appear from nothing. does that mean there is a never ending ladder of gods over gods you people make no sense. And life appears where there is no life still. They found microbes living in arsenic. which means that carbon based life forms are not alone in this universe

Under the natural sciences.

**EDIT**

"Simon T", in the end you are absolutely correct-it's all about quantum mechanics at the foundation of everything. And you're also right that it's kinda freaky! (Cool, but freaky.)

The Reliance building in Chicago was one of the first modern skyscrapers.

Creationism. I've not heard the term outside it.

Biochemistry sounds about right.

Yes, biochemistry, and a little inorganic chemistry.