On exactly the same date as last year.ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.

A few weeks can make a big difference.ScienceAlert stories are written, fact-checked, and edited by humans, never generated by AI. Don't miss a story, subscribe here.

Scientists have discovered a rare star formation hidden in a distant galaxy, unlike anything seen before beyond the Milky Way. What’s more, the discovery offers a brand new way to measure the distribution of dark matter in distant galaxies.

What does a home actually need to do for us, beyond keeping the weather out? Engineers at MIT have started mapping the answer for astronauts heading to the Moon and Mars, tracing exactly how the walls, layouts and lighting around a person shape their stress, their loneliness and their sense of belonging. It turns out the science of surviving a place and the science of living in one are not the same thing at all, and I have spent enough of the last year thinking about that difference to know how much it matters.

Planet building was supposed to be one of the universe's slow projects, something that only got going billions of years after the Big Bang. New research suggests otherwise. The raw materials for rocky worlds, and perhaps even the water needed for life, may have been ready to go just 100 million years after the Big Bang, long before the first galaxies had even taken shape.