How does the persistent search for dark matter exemplify the scientific method's power and limitations?

The dark matter saga is a masterclass in the scientific method: observation of anomaly, hypothesis generation, rigorous testing with multiple lines of evidence, and a relentless pursuit of direct verification. It showcases science's strength in building robust models from indirect evidence. Yet, it also highlights its limitations when direct observation of the hypothesized entity remains elusive, forcing scientists to be creative and patient in their experimental designs. It's a testament to human curiosity driving exploration into the deepest unknowns.