The two principal abiogenic petroleum hypotheses, the deep gas hypothesis of Thomas Gold and the deep abiotic petroleum hypothesis, have been scientifically reviewed without confirmation. Scientific opinion on the origin of oil and gas is that all natural oil and gas deposits on Earth are fossil fuels and are, therefore, biogenic.
In short a Thru Axle design incorporates a solid rod or hollowed shaft that passes directly through the hub and both legs of the fork or rear frame members. It is then secured to one side of the fork leg or rear frame member (typically on the brake rotor side) by a threaded mechanical connection.
The purpose of an axle is to secure the wheels or gears to specific locations relative to other wheels or gears. Every vehicle with wheels has an axle. To find it, look for the wheels and then look underneath the vehicle for a method of securing the wheel in place. Without an axle, the wheels would not remain fixed in position and the force and weight of the vehicle would make the wheel bend flat.