The Frontier

Al-Khalili distinguishes psychological time from physical time, noting that the equations of physics contain no flow of time and treat all moments as equally real.

Al-Khalili explains that Kip Thorne mathematically proved wormholes can act as shortcuts through unified spacetime. This relativistic shortcut theoretically allows for traversable travel to both the past and the future.

Karl Schwarzschild solved Einstein's equations to predict black holes and point singularities. Al-Khalili notes that spinning black holes instead produce ring singularities, which mathematically hint at wormholes or stargates.

Physicists struggle to unify general relativity and quantum mechanics because their mathematical frameworks are fundamentally incompatible, pitting spacetime geometry against quantum probabilities.

John Bell proposed an inequality test in the mid-1960s to evaluate quantum non-locality. Subsequent laboratory experiments proved Einstein was wrong, demonstrating that entangled particles do communicate non-locally.

Al-Khalili favors the realist de Broglie-Bohm pilot wave theory, which posits that particles have objective trajectories guided by an underlying quantum potential.

Anthropic used AI in September 2026 to complete a formal computer verification of Fermat's Last Theorem in 11 days. AI models have also resolved other historical mathematical problems like the Jacobian conjecture.

Matthew Pines launched Physical Super Intelligence with 58 million dollars in seed funding. The startup uses its Emmy platform to decompose research problems and attempt to discover new physical laws.

Material scientists discovered that rotating two sheets of graphene to a magic angle of just over 1 degree alters its physical properties. This geometric adjustment converts the material from an insulator into a superconductor.

Fritz Zwicky proposed dark matter in the 1930s to explain galaxy cluster cohesion. Al-Khalili explains that this invisible matter cooled faster than normal matter after the Big Bang, creating the gravitational scaffolding for galaxies.

Astronomers in 1998 observed that distant galaxies were moving slower than expected, proving cosmic expansion is accelerating. Physicists coined the placeholder term dark energy to describe the unknown force causing this acceleration.

Al-Khalili argues the universe is likely finite and closed rather than infinite. A finite universe avoids the mind-boggling paradoxes of an infinite system existing at the moment of the Big Bang.