Extra dimensions of space — the idea that we are immersed in hyperspace — may be key to explaining the fundamental nature of the universe. Relativity introduced time as the fourth dimension, and Einstein’s subsequent work envisioned more dimensions still — but ultimately hit a dead end.

This video is part of our Brilliant Breakthroughs series: our new 20-episode mini-series exploring the “Eureka!” moments and proud accomplishments of the greatest scientific minds of our time. Join us …

Inflationary Cosmology’s co-founder Andy Albrecht joins Brian Greene to examine cosmic mysteries from the highly ordered beginning of the universe to the possibility of a multiverse. This program is part …

Neuroscientist André Fenton’s fascination with the human brain led him to study how we interpret the world. Check him out as he leads a group of students through interactive games …

So you thought nobody could know what you’re thinking? Well, you’re right. For now. But fMRI brain research, identifying patterns linked to thoughts, is moving forward at a pace that’s surprising even experts.

Visual illusions, from magic tricks to images that have sparked internet feuds, are providing scientists with evolving insight into the complex act of seeing. Illusions play with the way our …