Popular Science font here refers to the font used for the current logo of Popular Science, or PopSci, which is an American monthly magazine covering popular science and technology subjects.
The Popular Science logo was probably designed based on FF Din Pro Black, with small modifications on letter “C”. Din is a realist sans serif typeface designed by Dutch desiger Albert-Jan Pool. The font is a commercial one and you can view details here.
Download Din Font
The Din font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.