The Journey from Black-Hole Singularities to a Cyclic Cosmology Sir Roger Penrose gives the annual Sir Thomas Gresham lecture on The Journey from Black-Hole Singularities to a Cyclic Cosmology.
The Big Brain: Size and Intelligence For centuries, scientists have tried to identify what is special...
Doing Business in Interstellar Space Imagine that interstellar trade is possible at speeds close to...