You are on the right train of thought OP, but the earths magnetic field is not entirely responsible for this. What it seems you are attempting to conceptualize are the dimensions of existence we live in and amongst. Some small commonly over-looked examples are that nothing is solid but made up of compacted vibrating atoms, and how we actually never touch anything because of this vibration causing a thin layer of resistance that acts as a separating barrier. DNA doesnt cause memories, but its "activation" allows for peak mind performance, and part of that is access to many thoughts and memories, many from past or parallel lives.
There are many "new" theories on gravity being discussed in the scientific and quantum theory communities, some of which support 'Loop Quantum Gravity' and 'Teleparallel Gravity' theories.
... we just arent aware of how this is experienced, not how to experience it.
How to be better aware is to do the simple things like pray, meditate, yoga, eating well,
antioxidants turmeric and lime juice etc.
The mentions of solar-rays I really like, and have taken to sun gazing lately. Not staring directly with my eyes open, but with them closed, and my for head facing it for 20-30 seconds. Doing so in the early morning or mid-late sun set is best. The pituitary gland has only few functions, part of my personal theory is that the pituitary/pineal glands interaction with the helix coils of DNA is a large one, via the blood stream. Only the kidney and pineal gland receive direct blood flow, and the iron content of blood I imagine is responsible for much of this chemical turned electrical interaction.