In recent years, attention has turned to psychedelics such as psilocybin, the active compound in “magic mushrooms”. Despite a number of clinical trials showing that psilocybin can rapidly treat depression, including for cancer-related anxiety and depression, little is known about how psilocybin actually works to relieve depression in the brain.

Now two recent studies, published in The New England Journal of Medicine and Nature Medicine, have shed some light on this mysterious process.

The new analysis of data from the 32-year-old Hubble Space Telescope continues the observatory’s longstanding quest to better understand how quickly the universe expands, and how much that expansion is accelerating.

The number astronomers use to measure this expansion is called the Hubble Constant (not after the telescope but after astronomer Edwin Hubble who first measured it in 1929). The Hubble Constant is a tough one to pin down given that different observatories looking at different zones of the universe have delivered different answers. But a new study expresses confidence that Hubble’s most recent effort is precise for the expansion it sees, although there is still a difference from other observatories.