These flies under lockdown from 1920
The flies (the Cantor S strain of Drosophila melanogaster) in this bottle are living and perpetuating in a small milk bottle micro-ecosystem from 1920s. What happens to an organism when not exposed to the wild environment? A table-top model system to study evolution.
While we are under lockdown, we are making sure that this chain is not broken. Five weeks of lockdown could break this lineage. But, thanks to several labs around the world that maintain this fly to ensure the chain is never broken.