What’s hot in science? Research news for the day of Jan. 13, 2022

At the center of the Milky Way is a supermassive black hole 4.3 million times bigger than the sun known as Sagittarius A*. Until recently, it was not clear how much of the matter at the heart of the galaxy was Sagittarius A*. …

In an oceanic omen for climate change’s intensifying effects, new research shows that seagrass suffers from a lesion-filled wasting disease through large swaths of intertidal meadows in the Pacific Northwest. The grasses’ once vibrant root systems are …