This strange experiment, in the midst of Europe, could not possibly continue for so long, and yet it has.

Nonetheless, the experiment has had - and continues to have - a significant impact on the debate.

These experiments continued throughout the 1960s and into the 1970s.

This week, our experiment continues and grows, as we welcome another great Y!

The pops experiment continues with two further programs this weekend.

The experiments continued until the end of September 1880.

So the experiment will continue past its original March cutoff.

"Then the old experiments and lessons still continue in the tower."

Operations and experiments continued until the end of the war.

This short-lived experiment continued only until the end of September 1880.