Evolution is a slow process that cannot be seen in real time. So evidences of evolution are always searched backward in time, using the fossil record, genetics or biochemistry of living things today, but it cannot be studied forward (we never know how species are going to change).
|Plates with bacteria culture|
The conclusion in this experiment, which has been operating for over 25 years, is evolution never stops, even when the conditions of life do not change.
|Experiment data. Science|