Phylogenetic analysis is a way of understanding the evolutionary history of an organism and placing it on a spectrum that organises the biological diversity of our planet.

Since the beginning of the pandemic, researchers from around the world have attempted to use it to confirm the origins of SARS-CoV-2, the novel virus that causes COVID-19.

In this RAZOR animation we explore the roots of a phylogenetic tree of coronaviruses to ask - where did SARS-CoV-2 come from?