Alex Warren ’s “Ordinary” continues atop the Billboard Hot 100, as his first leader on the list adds a fourth week at No. 1.

Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

Alex Warren 's "Ordinary" remains the biggest song in the world, as it tallies a ninth week at No. 1 on the Billboard Global ...

Alex Warren ’s “Ordinary” remains the biggest song in the world, as it notches an eighth week at No. 1 on the Billboard ...