I believe that psychic abilities, phenominons, and experiences are real.
Science can explain most, if not all, things psychic, so I do not believe those things are real.
If you believe that something is real, and science can even explain how it works it is still real. It still does happen.
If you understand science at least you understand how a phenomenon occurs...but that doesn't change the fact that certain phenomenon do happen and are real.
If you don't understand science it will remain like some hocus pocus magic to yourself....but that doesn't make it less real neither.
So some people can doubt certain phenomenon at that stage that science doesn't have an explication for it yet.
I don't know if we always have to wait till science catches up with certain phenomenon.
Yoga is one of the things that I enjoy.
But it is only in the recent years that science catches up with the ancient spiritual explications. And modern science (that I see just as another way of observation and another language of writing down observations and laws that can be concluded) seem to come to same conclusions about many spectra of Yoga as it comes to health.
I think it is good to use other observation methods like they do in modern science.
But I don't think it is always really needed.
Our natural instruments work very well, we can actually feel the benefit of yoga for our health without measurement instruments of modern science.
But if you don't trust your own tools enough...or you feel that they are in trouble and you can't rely on them....it is wise to use some external tools from modern science to check what is really going on.