Science has explained many aspects of love. It has explained why we love certain people and not others through its theory of evolution. It has explained why we remain committed to one person for a period of time. It has even explained universal perceptions of beauty and can separate familial love from romantic love.
Love is inherently knowable and definable. We can detect love in the animal kingdom. Dating apps can effectively predict when love will occur. Love does not reside in the divine realm. It sits in our brains, is transported in our hormones and is expressed in our actions. It is a physical phenomenon explicable through scientific research.