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.

The Kilogram

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.

Zombie Invasion

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 discovered two radioactive elements and showed that radioactivity was a property of atoms, not compounds.

Going Bananas about Radioactivity

This article looks at how we are exposed to radiation from many different sources, including the food we eat - even bananas.

Catalyst is a science magazine for students aged 14-19 years. Annual subscriptions to print copies of the magazine can be purchased from Mindsets.