interesting, it seems me and this scientist have the same concept of what time can be.
I have a interesting idea that can add credibility to this theory. I know that DNA degrades in time and I think it's a part of what makes us age.
What if something in space is making the DNA degrade over time? What if lets say, the gravity is making our DNA degrade? If we can find out if the DNA is degrading because of something happening around or with the planets we can conclude that planets and objects in space are at least a part of time.
I think it's important to ask small questions like the above and not overfocus on all the big ones.