Penrose News

NO

Einstein

Newton

Maxwell

Someone who solves quantum gravity

Richard P. Feynman

Pauli

Schrödinger

Fermi

Dirac

Heisenberg

Planck

Boltzmann

@121

Bohr

Bose

Someone to cause a paradigm shift in understanding the physics of experience

Lorentz

Someone with high achievement in experimental physics

Poincaré

Tycho Brahe

Johannes Kepler

Someone who convincingly replaces quantum mechanics with a better framework

Stephen Hawking

Demokritos (sp)

Shen Kuo

Ibn al-Haytham

Ernst Mach

Heisenburger

Archimedes

YES

NO

Different observers may have time's arrows pointing in different directions

Anthropic selection: observers necessarily find themselves in regions with increasing entropy

The arrow reflects brute initial conditions; there is no deeper explanation to be had

Growth of quantum entanglement under unitary dynamics explains thermodynamic irreversibility

Gravitational instability and cosmological expansion generate the observed thermodynamic arrow

Inflationary cosmology dynamically selects special low-entropy initial conditions, explaining the arrow

Entropy increase is emergent from coarse-graining and typicality; no deeper micro-physical asymmetry is needed

Time’s arrow arises from asymmetric boundary conditions at both temporal ends (two-time boundary conditions)

Landauer’s principle and information-erasure costs make entropy increase a consequence of information processing constraints

The Past Hypothesis is a fundamental lawlike assumption, and a low-entropy beginning fixes the arrow

Computational irreversibility and algorithmic complexity growth are the deeper source of the arrow

Objective quantum-collapse dynamics are time-directed (e.g., GRW), grounding macroscopic irreversibility