Observations of black holes, which form from the remains of massive dead stars, suggest that these once considered abstract, theoretical objects are in fact regular parts of our cosmos. Physicists still lack theoretical understanding of black hole horizons and what happens behind them. For example, they are largely interested in figuring out precisely how the initial information comes out after the black hole evaporates. The EU-funded BHHQG project will address such questions by studying holographic models of lower-dimensional gravity. The researchers will use the Jackiw–Teitelboim gravity theory, which has recently been solved exactly at the quantum level, to increase understanding of black hole horizons and the black hole information paradox.