Your coffee cools because it sends out invisible light. To keep its warmth, it would need exactly the same light energy back. Scientists found that this steady exchange requires light with an average energy 2.7 times the thermal jiggle. From your cup to the Sun, all warmth is a dance of photons.
🎯 The 2.7 ratio is written into the universe: it comes from π and the Riemann zeta function, meaning your coffee's warmth is tied to the same numbers that shape the orbits of planets and the distribution of prime numbers.