The Planck scale is often described as the arena in which both quantum mechanical and gravitational effects come into play. The Planck length is tiny (compared to the sizes of everyday things) and the Planck mass is huge (compared to the mass/energy of elementary particles). Join co-founder Dr. Brian Greene in Episode 15 of #YourDailyEquation: The Planck Length (or Why String Theory is Hard to Test). Link in bio. #math #physics #planck #quantum #gravity #mass #mathematics