# Blog

## Fright’ning Nemo

By Ariel Marcy, 20 February 2024

They’re cute, colourful and … clever? Scientists just discovered that common clownfish can count! Or at least, they can recognise the number of stripes on other fish. And it helps them pick their friends from foes.

Categories:

## Scientific notation sprinkles

By David Shaw, 7 April 2017

In everyday life, most numbers we use are less than 1000. Sometimes scientists need to use MUCH larger numbers. Here’s an insight into how they do it.

## Maya numbers

By David Shaw, 7 March 2017

The numbers that we use are not the only way to write numbers. You might know how to count with tally marks, or read Roman numerals. But there are plenty of other ways to write numbers. This one comes from the Maya people.

## Counting by division

By David Shaw, 5 December 2016

Let’s look at a few interesting patterns you can get by dividing. Some of these patterns need a lot of digits, so get the best calculator you can find.

## Count to a million

By David Shaw, 16 September 2016

How long would it take to count to one million? Well you could just start a stopwatch and get to counting, but here’s how to work out if you’ll be done by dinner time.

## Clever counting keeps fusion firing

By David Shaw, 14 August 2014

The Australian National University recently renovated their fusion reactor. This magnetic marvel harnesses immense pressures and temperatures to replicate the reactions that power our Sun. And there’s a lot of maths that helps to keep the reactions going! A fusion donut Fusion reactors use hydrogen as fuel. Under intense heat and pressure, the electrons leave […]

Categories:

## A game of Nim

By David Shaw, 24 December 2013

Grab some tokens and let’s go! Here’s a simple game to play with a friend.

## Counting gears

By David Shaw, 4 December 2012

This crafty cog activity will get your mind spinning and help you learn more about how we count. Safety: This activity uses a craft knife. Ask an adult to help.

## Why choose the Double Helix magazine for your students?

Perfect for ages 8 – 14

Developed by experienced editors

Engaging and motivating

*84% of readers are more interested in science

Engaging students voice