Inflation

10e-36 seconds after The Big Bang

The universe expanded at an inconceivable speed, from far less than an atom to enormous size. 

The fundamental forces: Gravity (the force that pulls everything together), Electromagnetism, weak, and strong interaction (the force that holds nuclei together) emerged. 

Quantum fluctuations produce the microscopic 'wrinkles' in density that keep the universe from becoming completely uniform and homogeneous. This paved the path for subatomic particles like quarks to be formed.