Author: Ailsa Harvey

What is used to colour stained-glass windows?

(Image credit: S. Hermann & F. Richter/ Pixabay) Question from Nicholas Foster Metal salts and tiny metal particles have coloured stained glass for thousands of years. For metal particles, this uses the electron movement...

Who was Erwin Schrödinger?

Introducing the influential physicist whose cat controversy made waves across the science community (Image credit: Nobel Foundation) When you think about Austrian physicist Erwin Schrödinger, your mind may first turn to his famous thought experiment surrounding a...

Why do glaciers retreat?

Find out how some of Earth’s most impressive frozen features are disappearing (Image credit: ArtTower/Pixabay) Glaciers form in areas of snowfall where conditions are cold enough to allow snow to lie until it has frozen into...

How does the London Eye work?

Over 20 years since this giant city-centre wheel opened: jump aboard and explore its past (Image source: Pixabay) For 20 years, one large eye has watched over the antics of the UK’s capital city,...

How has TV tech evolved?

From CRT to 4K, OLED to HDR, understand the acronyms that have marked telly’s transformation On 26 January 1926, Scottish inventor John Logie Baird demonstrated a working television at his London lab. However, few of...

How to make the perfect pizza

The physics behind creating this tasty Italian dish (Image source: Pixabay) From its humble beginning, sold only by street vendors in the Italian city of Naples, pizza has become much more than a delicious source of cheap...

The impact of cattle farming

With over a billion cows populating our planet and thousands of years of bovine breeding, how is the world changing? (Image source: Pixabay) Cows have been providing products for us for millennia, and are more...

Why weren’t ships made of metal sooner?

(Image source: Pixabay) Question from Joe Robertson Although metal work has existed for centuries for things such as swords and armour, the sheer amount of metal required and the techniques needed to forge them...

What happens to the body in space?

Preventing organ damage and boiling blood, spacesuits protect astronauts from the deadly conditions of an icy vacuum (Image source: Pixabay) The human body, while perfectly suited to conditions on Earth, wouldn’t fare quite so...