The three dimensional organization of genomes is a key player in multiple biological processes including the packaging and release of viral genomes. The genome of some viruses, such as bacteriophages or human herpes, is a double stranded DNA (dsDNA) molecule that is stored inside a viral protein capsid at a concentration of 200 mg/ml-800mg/ml and an osmotic pressure of 70 atmospheres. The organization of the viral genome under these extreme physical conditions is believed to be liquid crystalline but remains to be properly understood.