At https://phys.org/news/2024-07-alternatives-dark-cosmological.html …. has the headline – we need to reconsider alternative ideas to dark matter that better explain cosmological observations. Does the speed of light change over time? [as an example]. It is believed, by some cosmologists, that dark matter and dark energy explain oddities observed in space. However, recent research seems to show the universe is expanding without dark matter or dark energy. It seems there are problems with redshift – once again. Redshift is measured from exploding stars – supernovae. Their observed brightness can determine the expansion rate. That is the mainstream position.
At https://phys.org/news/2024-07-astronomers-earth-dark-comets.html … up to 60 per cent of Near Earth objects could be dark comets. Did they deliver water to earth? Dark comets combine characteristics of both asteroids and comets.
At https://phys.org/news/2024-07-nature-high-energy-gamma-ray.html … very high energy gamma rays.