https://www.youtube.com/watch?v=S4aqGI1mSqo&ab_channel=PBSSpaceTime
#Science #Physics #Astrophysics #Cosmology #BlackHole #BlackHoles #WhiteHole #EventHorizon #TimeReversed #Time #AlbertEinstein #Einstein #GR #GeneralRelativity #KarlSchwarzschild #Schwarzschild #SchwarzschildMetric #Singularity #FutureSingularity #Penrore #RogerPenroseDiagram #Penrose #Entropy #2ndLaw #Thermodynamics #PBS #Spacetime #MattOdowd