@wandeljw,
Is it not obvious wande that the sunshine, from which all life derives its energy, is periodic. That we call a cycle 24 hours has nothing to do with anything biological. And the cycle is variable except for a statistically infinitessimal equatorial line and even that might vary with variations in earth tilt and orbit changes due to conjunctions of the planets or even objects further out.
The research may have great value in relation to activity of humans who have disrupted natural cycles by such things as lighting, air conditioning and rapid transit methods. I think the analogy with clocks is unscientific and likely to mislead readers. A clock measures the sun
I can't see any relevance to the teaching of evolution. A daisy keeps what looks like time to us but it isn't doing. It might not be as spectacular as a dinosaur but there's a lot more of them and they are still with us. One might say that daisies are more beautiful as well because they have no anal sphincter. I often think it is difficult to assign beauty to an organism with one of those and that doing so is something of an illusion.
I hope all this scientific expertise and taxpayer's involuntary funding doesn't end up proving that there's no place like home and that the ads on telly and in the travel agent's glossy brochures are dangerous to health as I think they are.