Relationship between karma and science How can science support or challenge the concept of Karma?
They are perfectly compatible. The teaching of Karma is about latent (potential) result of our actions and choices. Science is in complete support with the idea of potential energy, latent results etc. It's just normal causation, albeit its subtle/hidden aspect, nothing magical.

It's like, when you act like a jerk, it leaves aftertaste with people, and then it comes up in the middle of other situations sooner or later. Or, you keep rushing in your daily life and leave simple things not taken care of, like taking out garbage or paying bills - and then these little things accumulate and really interfere with your life. It is stuff like that. Our actions, our intents leave residue, they create some little tensions in our mind, in other people mind, in the fabric of everyday things - and that stuff eventually comes up as some funky result downstream. I repeat, it's not magic, it is totally normal stuff - just hard to see because it's subtle.