In its 40 years of existence, Washington, D.C.-area heavy rock outfit Pentagram has won over music critics, influenced countless bands and spawned an entire genre of music.

A previously unknown, hidden internal "void" was recently identified in the Great Pyramid of Giza. The research was published Thursday in the peer-reviewed British journal Nature.

ScanPyramids’ Big Void 3-D Artistic view. ScanPyramids mission. Previously, the ScanPyramids team has said their findings hint at the existence of secret, hidden chambers within the Great Pyramid.

I have spent years working to understand what cosmic voids teach us about the wider universe and its history. And in the course of my studies, I have learned to reject that temptation.