The Evolution of Sensitivity

"There's going to be some sort of continuum upon which I'll say like it's probably going to be kind of hazy in here," he says. "We should be talking about a sliding scale here rather than an on and off switch because of the fact that you could resurrect every evolutionary link between those two animals" He adds, "It seems much more plausible that we should look at this as either going slowly from 100 all the way down to zero at some point over here pretty much equally"