Northstar service between Minneapolis and Big Lake, Minn., was shuttered Jan. 4, with buses replacing trains along the route, according to local media reports. “This was a challenging decision,” the ...

Gram-stained section of a macrophage with ingested S epidermidis bacteria, seen as purple granules within its cytoplasm. In this stain, the nucleus appears pale, with a reddish nucleolus. It is ...