A'most ambitious experiment' in a short story could imply that the experiment is on a grand scale. It might be an experiment in a social or psychological realm, such as an attempt to change an entire community's way of thinking. The short story would then explore the consequences, both expected and unexpected, of this very ambitious undertaking.
I'm sorry, I don't know the 'A Most Ambitious Experiment' short story well enough to say who the main characters are. They could be scientists if it's a scientific experiment - type story, or they might be ordinary people who get caught up in the experiment.
I haven't read the 'A Most Ambitious Experiment' short story specifically, so I can't analyze its plot directly. But generally, in a short story with such a title, the plot might revolve around a scientific or social experiment that is highly ambitious. There could be characters involved who are either driving the experiment forward or being affected by it. Maybe there are unforeseen consequences or challenges that they face during the experiment.
A compelling story would have a unique and risky experiment idea. It should also have characters that are deeply involved and whose lives are changed by the outcome.
I'm not sure specifically as you haven't given more details about it. It could be about a scientific experiment, a social experiment, or something else entirely.
One aspect to note in 'Dr Heidegger's Experiment' is the theme of mortality. The characters are given a chance to relive their youth briefly, which makes them face their past mistakes and the reality of growing old again. It shows how people often take their youth for granted and repeat the same follies when given a second chance.
The 'Russian Sleep Experiment' short story is quite a terrifying one. It tells of a cruel experiment in which participants are forced into sleep deprivation. As the days pass without sleep, the subjects start to lose their grip on reality. Their personalities change drastically. Some become violent, while others seem to be in a state of perpetual nightmare. It's a story that delves into the unknown and often overlooked consequences of extreme sleep deprivation, showing how it can turn normal people into something unrecognizable and extremely dangerous, not just to others but also to themselves.