https://arxiv.org/pdf/1412.2777.pdf I have always thought that Dark matter and Dark energy do not interact, but this paper says otherwise. Just because both are called Dark as a' place name for them' people think they must be akin to one another, I have always been told this is incorrect One of the biggest challenges in cosmology and astrophysics nowadays is to understand the nature of the two most abundant components of the Universe: dark energy and dark matter. These are usually described as two independent components where dark matter is responsible for most of the nonrelativistic matter in the Universe and where dark energy is responsible for the late time acceleration of our Universe, which is described by a cosmological constant in the Λ-cold-dark-matter (ΛCDM) model. This standard model is widely used to describe the cosmological evolution of the Universe , and it fits very well the current observational data. However, this model has some theoretical and observational challenges (see, e.g., Ref. ) that open the way for alternative models of dark energy.