Mechanisms for heat:
1. Accretion – material pulled to the surface – kinetic energy
of incoming debries – converted to thermal energy

2. Differentiation – heavy (more dense) material flowing towards the
core creates friction – thermal heat energy.

3. Radioactive decay (radioactive isotopes of uranium, potassium &
thorium) undergoes nuclear decay providing thermal energy.

I got the above information from Astronomy class – just took my final exam yesterday 98% I’m happy. But since it was previously noted that information should include a source – I found one. Not a totally thorough explanation but it supports what I’ve provided.

http://www.scientificamerican.com/article.cfm?id=000B2C71-BCF0-1C71-9EB7809EC588F2D7

i was completely asleep. i rember most of my dreams that was a wierd one at that. i was at a farm i suppose but i went into the pig pen and there was a wild boar it rammed me i was pinned to the fence by the the boar. it was pressing so hard i could not breath in. i had awoke and could not breath for a sec i felt like fighting for my life.

i also have many bouts with sleep paralysis. for the longest i thought i was possessed but that is a story for another time i suppose.