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Astronomers have identified the likely source of gas that flows into the maw of the Milky Way’s central black hole, Sagittarius A*.

The post What's Feeding Our Supermassive Black Hole? appeared first on Sky & Telescope.

We think of our body clock ticking over on a 24-hour cycle, but evidence is growing that it has seasonal rhythms, which could affect our response to vaccines

We think of our body clock ticking over on a 24-hour cycle, but evidence is growing that it has seasonal rhythms, which could affect our response to vaccines

A growing body of research suggests cannabis poses risks to the developing brain

The floating ice shelf of world’s widest glacier – Thwaites glacier in Antarctica – is detaching, with worrying implications for global sea-level rise

The floating ice shelf of world’s widest glacier – Thwaites glacier in Antarctica – is detaching, with worrying implications for global sea-level rise

What you should know about hantavirus, why PCOS is getting a new name, and how some fish hide in an unusual spot

Inside some very special black holes, there may be a boundary called a Cauchy horizon. Columnist Leah Crane explores the place beyond which physics breaks and anything is possible

Inside some very special black holes, there may be a boundary called a Cauchy horizon. Columnist Leah Crane explores the place beyond which physics breaks and anything is possible

These people are not in danger.

Hawking faced a question with no answer hiding behind it. The best boundary condition for the universe, he decided, was that there was no boundary at all. To make that statement into physics, he had to do something deeply strange to time.

Genetic analysis suggests interbreeding between two groups of human relatives

The long-tailed pygmy rice rat is the primary host for Andes virus, the type of hantavirus responsible for sickening passengers on the MV Hondius cruise ship

A newfound nocturnal navigation system challenges what entomologists thought they knew about how ants find their way

The equations of general relativity give up at the singularity. Decades before Stephen Hawking dared to guess what came before, John Wheeler and Bryce DeWitt built the strange mathematical machinery that would make the question askable in the first place.

Orion never had a sword like this.

NASA is starting to paint in some of the details of its planned 2027 Artemis III mission, but key questions, such as who its astronauts will be, are yet to be answered

The “coastline paradox” helped to define fractals, but coastlines themselves turn out to be less fractal than thought

In Ladakh, Himalayan wolves are increasingly breeding with feral dogs, giving rise to a new animal known as khipshang that could injure humans and outcompete other carnivores

In Ladakh, Himalayan wolves are increasingly breeding with feral dogs, giving rise to a new animal known as khipshang that could injure humans and outcompete other carnivores