Eternal Universe Theory (EUT) - The Eternal Resonance Cosmology An Inflation-Free Cosmology with Ultralight Axions

Key Points

• Cosmological parameters are derived without fine-tuning, aligning with observations from Planck, DESI, and SH0ES.
• Primordial black holes act as gravitational seeds, with densities shaped by cosmic voids and axions.
• This model circumvent the horizon and flatness problems through a brief stiff-matter phase in axion dynamics.
• Future observations from Euclid, LISA, and CMB-S4 could test this inflation-free cosmological framework.