Droplets-Water
Science

At what temperature is water at its densest?

Density is a measure of how much mass a material has in a specific volume of space. Therefore the more atoms per unit volume a material has and the more mass those atoms have, the higher the density will be. … Continued

Cracking knuckles
Science

Why do our knuckles crack?

Ever wondered what causes that loud popping noise when you crack your knuckles or stretch your joints? Watch our video to find the answer… By pulling on a knuckle, you gradually increase the space between the bones. As there is … Continued

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Science

How do the holes get in Swiss cheese?

To make cheese you need the help of bacteria. Different types of bacteria in different combinations give rise to the distinct variety of flavours in many cheeses. There are various different types of bacteria used for making Swiss cheese, the … Continued

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Science

How do lenses magnify or minimise things?

A lens is a transparent piece of glass or plastic with at least one curved surface. Light moves faster in air than it does through glass or plastic. So, when a beam hits a lens, it slows down. When a … Continued

massive-lightning-1920x1080-Widescreen-High-Resolution-1080p-HD-Desktop-Wallpaper
Science

Can glass be made from lightning hitting sand?

This is indeed possible as glass and sand are both made from the same chemical, silicon dioxide. Silicon dioxide has an extremely high melting point, so first the sand has to be heated past this for it to become a … Continued

Anguis_fragilis_large
Science

What is Britain’s largest lizard?

Britain is home to three native species of lizard: common lizards (zootoca vivipara and lacerta vivipara), sand lizards (lacerta agilis), and slow-worms (anguis fragilis). The longest is the slow-worm, which can reach 50cm (19.6in) in length; it is sometimes mistaken … Continued

Digestive system
Science

Top 5 Facts: Digestion

1) Complete digestion takes time! Generally, it can take between 24 and 72 hours for the food you eat to be fully digested, meaning you’re constantly digesting food! 2) Some food for thought… An average male will eat approximately 50 tons … Continued

Stop-Your-Stomach-from-Growling-in-Quiet-Places-Step-6
Science

Why do our stomachs rumble?

Has your stomach ever publicly embarrassed you by rumbling loudly during a quiet moment, making that awkward silence just that little bit more awkward? Well, it’s not necessarily your body’s way of telling you that it needs to be fed, … Continued

Screen Shot 2015-04-23 at 10.42.32
Science

How does the healing process work?

The human body has amazing regenerative powers, but how do they work? Find out in just 30 seconds with our simple explanation, complete with illustrations! Find the answer to more baffling questions in How It Works magazine. Issue 72 is now on … Continued

spider-web-2
Science

How do spiders make webs?

A spider’s web is one of nature’s greatest engineering feats, but how are they made? Find out in just 30 seconds with our simple explanation, complete with illustrations! Find the answer to more baffling questions in How It Works magazine. Order it … Continued

Man laughing
Science

Is laughter contagious?

Have you ever noticed how you tend to smile if you hear other people laughing? Or how you laugh a lot more at a film in a cinema full of people than if you were alone? Well it seems we are … Continued

Heart transplant illustration
Science

How does a heart transplant work?

Replacing a heart is obviously a complicated procedure, but how is it done? Find out in just 30 seconds with our simple explanation, complete with illustrations! Find the answer to more baffling questions in How It Works magazine. Order it in print, download it onto … Continued

Time
Science

How is time measured?

Our measurement of time is determined by the orbit of the Earth around the Sun, and the Moon around the Earth. In the western world we use what is known as the Gregorian calendar, as described here. However there are … Continued

compass_rev2
Science

How do we calculate where magnetic north is?

Rather than calculating the magnetic poles, they must be found by expedition. They are defined as the points on Earth’s surface where the magnetic field points vertically down, so you need to be on top of them to really know. … Continued

Skin illustration
Science

Top 5 Facts: Skin

1) Bacteria thrive on human skin Every square inch of skin has an average of 32 million bacteria on it… no matter how many baths or showers you have a day! 2) You shed skin every day Every 24 hours, you … Continued

Clock
Science

How to cope with the clock change

On Sunday 29 March the clocks go forward by an hour, meaning we lose an hour of sleep. This can throw the circadian rhythms that control your body clock out of sync, making it difficult to get up at your usual … Continued

vaccine
Science

How do inoculations work?

The term inoculation and vaccination are used interchangeably. They involve introducing a foreign substance (antigens) into the body, causing antibody production. These can either be dead, made less harmful, or just contain certain bits that cause disease. White blood cells … Continued

RS50917_Lightsplit3-1-hpr
Science

Home science experiments: how to create a rainbow

It’s British Science Week, and here at How It Works we’re celebrating by showing you some of our favourite science experiments that you can try at home. Here’s what you’ll need to make a rainbow for yourself. Checklist: Glass of water Cardboard Scissors … Continued

DIY crystals
Science

Home science experiments: Grow your own crystals

It’s British Science Week, and here at How It Works we’re celebrating by showing you some of our favourite science experiments that you can try at home. Here’s how you can grow your own crystals using just salt and water! You will need: 75g … Continued

RS50875_Comb3-hpr
Science

Home science experiments: How to bend water

It’s British Science Week, and here at How It Works we’re celebrating by showing you some of our favourite science experiments that you can try at home. Here’s how you can bend water with a clever experiment you can easily in … Continued

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