The first question that you might have is, “Can flies escape a vacuum?” A simple answer is no, because it is very unlikely for a fly to survive in a vacuum cleaner. This is because flies are more sensitive to moving objects and will not survive a vacuum cleaner unless the nozzle is aimed directly at it. Depending on the type of vacuum cleaner you have, a fly may survive for a few hours or days.
To determine whether a fly can escape a vacuum, scientists first had to look at its structure. This was done using a scanning electron microscope. In a vacuum, air molecules cause the images to be distorted. The scientists observed that most organisms in the vacuum viewing chamber died. However, fruit fly larvae continued to wriggle about as if nothing was amiss. The larvae later matured without any adverse effects.
Then, they decided to test the vacuum chamber on flies, eggs, and other materials. However, the lab has come under criticism for putting animals into such experiments. They have also been accused of animal cruelty by critics. However, the lab also tested the chamber on a variety of materials such as coke, blood, and eggs.
It is also important to remember that flies do not die when sucked up by a vacuum. The vacuum is designed to kill bugs, but it is not impossible for them to escape. A vacuum cleaner can kill spiders and cockroaches because they have no exoskeleton.