Different methods of measuring the Universe's expansion rate yield high-precision, incompatible answers. But is the problem robustly real?

Why do we fall in love with one person over another? The late biological anthropologist Dr. Helen Fisher unpacks the evolutionary roots of romantic love, sex, and attachment.  Using research […]

If you want to understand the Universe, cosmologically, you just can't do it without the Friedmann equation. With it, the cosmos is yours.