What is the definition of Longer Human Experiments?

"Longer human experiments" is like when we start asking people to stay on a TV show for way too long, beyond the initial five episodes. It's the kind of situation where you're so curious about their every move, they start acting suspiciously. Here's an unsettling example sentence: "The lab conducted longer human experiments on rats, convinced they could turn mice into superheroes by the time the trial ended in a midnight cry."