Science books that can transform complex cosmic ideas into poetic, personal, and unforgettable narratives that are far more ...

is simply a specific solution to Einstein’s field equations, which map space-time geometry within certain matter and energy conditions. Sadly, these sci-fi dreams rest on the fantastical concept ...

The universe rarely fails to amaze. One of its latest surprises—nicknamed the “Einstein zig-zag”—reveals a stunning ...

Emphasis is put on quadratic Lagrangians which yield the Einstein field equations, as compared with Hilbert's original linear Langrangian, thus gravitation follows the other Gauge Fields all of which ...