Feature

Knotting Weakens a Polymer Molecule

Edible Compound Mimics Insulin

Physics

Front Matter

Getting to the Root of Protein Production

More than One Way to Mutate a Cell’s DNA

Parasites Make Frogs Grow Extra Legs

Science News Books

Last Drop Squeezed from Recycled Tires

Back Matter

Plants Signal Stress with a Toluene Burst

Astronomy