Can I Publish the Same Article in Two Journals?

No, you cannot submit the same paper to more than one journal at the same time. This is known as simultaneous or concurrent submission and is considered as an unethical practice.

Can authors publish the same content in multiple papers?

In allowing publication of a manuscript, the author must assign copyright to the journal's publisher, and obviously it is illegal to assign copyright of the same material to multiple journals and publishers.

Is it bad to publish twice in the same journal?

Technically, it is perfectly acceptable to submit two papers to the same journal at the same time. In fact, for closely related studies or if your article is a series, that is, Part 1 and Part 2 of one big study, then it is always preferable to publish it in the same journal.