Catalyst Volume 22 Issue 3 This issue of Catalyst includes the
following articles: The Price of Rice This article looks at how
genetics has increased yields of rice, a staple food for
billions of people. What Causes the Aurora? The aurora borealis
is caused by the interaction of the solar wind with the Earth's
magnetic field. This article explains how satellites are testing
thoeires of how this happens. This Catalyst article looks at the
changing definition of the kilogram, a unit of mass and a base
unit in the SI system (the International System of units).
What's in a Cell? This Catalyst article explores the complex
structure of cells, and numerous theories of how they were
formed. This article looks at how Californians are being
encouraged to prepare for the next big earthquake. Seven Billion
- and Counting The human population of Earth has reached seven
billion. This article explores the impact human activity may
have on the planet. Marie Curie - a Life of Discovery This
article looks at Marie Curie who di