Over the course of billions of years, the universe has steadily been evolving. Thanks to the expansion of the universe, we are able to “see” back in time to watch that evolution, almost from the beginning. But every once in a while we see something that doesn’t fit into our current understanding of how the universe should operate. That’s the case for a galaxy described in a new paper by PhD student Sijia Cai of Tsinghua University’s Department of Astronomy and their colleagues. They found a galaxy formed around 11 billion years ago that appears to be “metal-free”, indicating that it might contain a set of elusive first generation (Pop III) stars.
I’ve been reflecting on the disappointing outcomes and the reaction to Sarepta Therapeutics’ recently announced clinical trial results for its Duchenne muscular dystrophy treatments, AMONDYS 45 (casimersen) and VYONDYS 53 (golodirsen). The tension is evident: Families want treatments that benefit patients, while critics note the evidence reveals a different story. Duchenne muscular dystrophy is a relentless disease. When a company suggests it […]
The post Hope, Evidence, and Hard Questions in Duchenne Muscular Dystrophy first appeared on Science-Based Medicine.All of the proposals floating around out there for invoking dynamical dark energy are a little on the weak side. In many cases, they raise more questions than answers.
Researchers using the NASA/ESA/CSA James Webb Space Telescope have confirmed an actively growing supermassive black hole within a galaxy just 570 million years after the Big Bang. Part of a class of small, very distant galaxies that have mystified astronomers, CANUCS-LRD-z8.6 represents a vital piece of this puzzle that challenges existing theories about the formation of galaxies and black holes in the early Universe. The discovery connects early black holes with the luminous quasars we observe today.
Observations of a merging black hole further supports the Area Theorem of black hole thermodynamics, which states that the event horizon of a black hole produced by two merging black holes must have a surface area no less than the areas of the original two.