A buoyancy problem involving a ping pong ball, an iron ball, a few strings, some water, and a set of scales is causing a few arguments on Reddit where it was posted. "Where would the scale tip?

The researchers defined healthy aging as surviving to age 70 without developing any of the 11 major chronic diseases and without experiencing ... While the study’s conclusions aren’t surprising, its ...

This cross-sectional study assessed the association between major dietary patterns and IFG in the baseline phase of PERSIAN Kavar cohort study (PKCS). Methods: The study included 3,144 participants ...

View Full Profile. Learn about our Editorial Policies. Most vertebrate skin appendages—hair, feathers, and scales—develop in a pattern dictated by the interaction of functionally opposing molecules.