In this talk we will have a look at dark matter made from very light bosons. After a brief review of the standard scenario of axion-like particles (ALPs) we will discuss some surpising aspects regarding the stability of ALP DM. Then we turn to non-minimal models. In particular we consider a scenario where the field space of the ALP is enlarged by a monodromy. In addition we have a look at the case where the light boson caries an approximately conserved charge.
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