The Instituto de Astrofísica de Canarias (IAC) is once again participating in the Miniferias de la Ciencia y la Innovación en Canarias, reinforcing its commitment to popularising science and bringing astronomy closer to the Canarian public. Through its Scientific Communication and Culture Unit (UC3), the research centre is taking part in the activities organised in La Palma from 22 to 24 May. Become astro-detectives for a day Astrophysicists and popularisers Alfred Rosenberg and Alejandra Goded lead the activity ‘Astro-detectives: How do astrophysicists study the Universe?’, an interactive

A team of cosmologists from the Institute of Astrophysics of Andalusia (IAA-CSIC) and the Institute of Astrophysics of the Canary Islands (IAC) has obtained the most accurate census to date of the dark matter halos of the Universe. The work is based on the development of a new model, called GPS+, capable of predicting how many dark matter halos exist at each stage of cosmic history. In the universe, there are enormous invisible structures surrounding galaxies and galaxy clusters. These are dark matter halos, concentrations of matter that do not emit light and cannot be directly observed, but