Highlights from the Atacama Cosmology Telescope

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The Atacama Cosmology Telescope (ACT) has been pushing our measurements of the Cosmic Microwave Background on small scales to high resolution and deeper sensitivity since 2008. While ACT stopped taking temperature-only measurements in 2010, ACTPol is now operating with polarisation-sensitive detectors. I will present some of the current ACTPol results in terms of the power spectrum constraints. In addition, I'll highlight some of our recent results using ACTPol data, including detections of both the thermal and the kinetic Sunyaev- Zel'dovich effects through cross-correlation with other probes. I'll discuss the lensing of the small-scale microwave sky as measured by ACT and discus how cross-correlating CMB lensing with other probes gives us a handle on galaxy properties like bias. Finally, I'll discuss the next stage in small-scale CMB cosmology: Advanced ACTPol, which will improve our understanding of the reionisation of the universe - arguably our least constrained epoch to date.