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We examine interactions between dark matter and dark energy in light of thelatest cosmological observations, focusing on a specific model with couplingproportional to the dark energy density. Our data includes Cosmic MicrowaveBackground (CMB) measurements from the Planck 2018 legacy data release,late-time measurements of the expansion history from Baryon AcousticOscillations (BAO) and Supernovae Type Ia (SNeIa), galaxy clustering and cosmicshear measurements from the Dark Energy Survey Year 1 results, and the 2019local distance ladder measurement of the Hubble constant $H_0$ from the HubbleSpace Telescope. Considering Planck data both in combination with BAO or SNeIadata reduces the $H_0$ tension to a level which could possibly be compatiblewith a statistical fluctuation. The very same model also significantly reducesthe $\Omega_{\rm m}-\sigma_8$ tension between CMB and cosmic shearmeasurements. Interactions between the dark sectors of our Universe remaintherefore a promising joint solution to these persisting cosmological tensions.

Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions