Feature

Following Gravity’s Loops and Knots

Wave or Particle? Heisenberg, Take a Hike!

Huge Testing Planned for Hormone Mimics

Physics

Pig Problems from Crowded Conditions

Too Big a Feast?

HIV’s Quiet Accomplice?

Biomedicine

Science News Books

Magnesium: Another Metal to Bone up On

Popsicle Planet

Front Matter