This work presents an analytical method for calculating the system matrix for a DC-SPECT system. The solid angle calculation is adapted for a square-shaped pinhole collimator. The calculated ...

Blue holes are submerged caves or sinkholes, typically circular, with steep walls. They get their name from the deep blue color of their water, caused by high water clarity and depth, which contrasts ...

The moon has a generous underground cave system that we could (maybe) use for bases Subsurface lava tunnels are important for our exploration of the moon. Scientists just found a very promising one.

He pointed out: “The Blue Hole is made of a complex system of caves that once formed on dry land. It is proof of how oceans can rise quickly and catastrophically.

Explore the enigma of Belize's natural wonder: Discover what formed the Great Blue Hole, a massive underwater sinkhole phenomenon.

The ocean is home to all manner of mysteries, from “alien” shape-shifters to ancient shipwrecks. And so, when Richard Branson and a team of scientists took a submersible down to the bottom of Belize’s ...

Deep in the Rising Star Cave system lies a mystery of paleoanthropology: a chamber filled with the bones of Homo naledi. How this species evolved, how it’s related to us and other human ...

TAOS — The North Central Regional Transit District, which operates the Blue Bus system throughout Northern New Mexico, celebrated its new, $17.8 million Transit Operations and Maintenance ...