Weeks' research contributions have mainly been in the field of 3-manifolds and physical cosmology.

What is known as physical cosmology shaped through both mathematics and observation the analysis of the whole universe.

These findings were a first step to rule out some of many alternative physical cosmologies.

De Sitter made major contributions to the field of physical cosmology.

These are controversial views which do not accord with the standard model of physical cosmology.

It is used to describe models of the universe in physical cosmology.

Davis' work has been in physical cosmology and he has done a number of significant projects.

In early 1960s he started working in astrophysics and physical cosmology.

The vacuum energy also has important consequences for physical cosmology.

The ultimate fate of the universe is a topic in physical cosmology.