The 'microbes' inside the milk need oxygen to survive and they use up the oxygen over a period of time. In this science experiment we will use a 'Methylene blue' solution to test how much oxygen exist in various...

Dogs give you joy. They give you loyalty, and often they give you sloppy kisses. Of course, there is that old saying, "a dog's mouth is cleaner than a human's mouth." Is that true?

Did you know that your skin is your largest organ? Your skin protects your inside organs while keeping infections out and prevents you from getting sick. A medium sized adult's skin weighs about 3,5kg! A human being's skin is...

An optometrist is a doctor concerned with your eyes as well as your vision. A 'Snellen' eye chart is the most common way for optometrists to determine how 'normal' your vision is. It sets a standard for what most...

Humans have 'stereoscopic vision', meaning that we can judge the direction and distance of an object because each of our eyes sees from a slightly different angle, resulting in a perception of depth. Similarly, because our ears are positioned...

An adult's lungs can hold about 5 litres of air when fully breathing in – How much air do you think your lungs can hold? With the following science experiment you can find out!

The human body has over 650 muscles and makes up 40% of the body's weight. Our muscles help us to move about our surroundings and is even responsible to make us smile, frown or chew our food. In this...

Optical illusions can also often cause us to perceive objects bigger, smaller or more bent out of shape than they really are. Study the optical illusions in this science experiment to see how confusing these images can be to...

Human beings can vary quite significantly from each other. Our size, shape, eye colour, hair colour and even our sense of balance is different from one another. In the following science experiment, study the sense of balance of some...

Ever notice how you breathe faster and you heart beats faster when you run around or do any exercise? This happens automatically as your body requires more oxygen to make the energy you require to do these exercises.