It’s a wonderful world — and universe — out there.

Explainers

Background pieces for a deeper dive into a broad range of pivotal topics

Planets
Explainer: What is a planet?

By Jennifer CutraroOctober 8, 2008
Physics
Explainer: The particle zoo

By Stephen OrnesSeptember 7, 2008
Physics
Explainer: Understanding light and electromagnetic radiation

By Janet RaloffApril 8, 2008
Animals
Explainer: Jelly vs. jellyfish: What’s the difference?

By Rachel EhrenbergApril 1, 2008
Chemistry
Explainer: What are oxidants and antioxidants?

By Janet RaloffMarch 19, 2008
Physics
Explainer: How a synchrotron works

By Emily SohnOctober 19, 2007