Carbon was not primarily produced during Big Bang nucleosynthesis because it requires higher temperatures and densities than were present in the early universe.

Big Bang Nucleosynthesis is the process by which light elements are synthesized from hydrogen and helium in the early universe.

Hydrogen is the most abundant element in the universe, accounting for about 75% of all matter.

The Big Bang Theory is the theory that explains the origin and evolution of the universe.

Carbon is primarily produced by stellar nucleosynthesis, which occurs in the cores of stars.

Stellar Nucleosynthesis is the process by which heavier elements are synthesized from lighter elements in stars.

Helium is the second most abundant element in the universe, accounting for about 25% of all matter.

The Big Bang Theory states that the universe is constantly expanding.

Uranium is primarily produced by radioactive decay, which occurs when unstable isotopes of heavier elements break down into lighter elements.

Radioactive Decay is the process by which radioactive isotopes decay into lighter elements.

Oxygen is the third most abundant element in the universe, accounting for about 1% of all matter.

The Oscillating Universe Theory states that the universe is oscillating between expansion and contraction.

Helium is primarily produced by nuclear fusion, which occurs when two or more atomic nuclei combine to form a single heavier nucleus.

Nuclear Fusion is the process by which atomic nuclei combine to form a single heavier nucleus.

Carbon is the fourth most abundant element in the universe, accounting for about 0.5% of all matter.