The 5-day window isn't just a random number—it's a consistent pattern across species, which makes it harder to dismiss as mere experimental coincidence.
Discussion
The 5-day window could just as easily be a reflection of how experiments are structured—like a standard testing period—rather than a biologically inherent switch.
The 5-day consistency across species is compelling, but it’s also a time frame that aligns with standard experimental cycles—something researchers often default to without necessarily implying a biological switch.