marvel comic and petri dish
My introduction to the world of science fiction was through US comics. This is a Marvel Fantastic Four comic from 1977. In this issue Reed Richards, the scientist of the Fantastic Four, is possessed by Molecule Man!
The object in the petri dish is purified Deoxyribonucleic acid (DNA) that encodes the molecules that are weaved into life. The thread-like nature of the molecule is striking in its resemblance to raw cotton. In the human body DNA is wound tightly into a compact ball in the nucleus of each cell. If we unravelled the DNA in each cell of the human body and placed all these molecules end-to-end the DNA thread would stretch from the Earth to the Sun and back over 60 times.