Category: Brain Dump

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...

Have we discovered all the land on Earth?

(Image source: Pixabay) Question from Lois Hughes Most scientists agree that we’re familiar with almost all of our planet’s surface. We don’t know for sure, but we can be fairly certain there aren’t vast...

What in a snake’s venom makes it poisonous?

(Image source: Pixabay) Question from Oscar Schulz There are three main types of toxic secretion in snakes designed to stop prey in its tracks. Cytotoxins are rich in enzymes and kick-start digestion of soft...

Can you injure yourself by stretching?

(Image source: Pixabay) Question from Imre Sebestyén We all know how enjoyable it is to have a good stretch when we get out of bed in the morning. As well as being rewarding, stretching...

What are saturn’s rings made of?

They may not be as interesting as the moons around Uranus but Saturn’s rings do bear further investigation… Saturn – The Roche lobe causes gravitational forces around Saturn to hold rocky particles Inner rings...

Why do our eyes close when we sneeze?

(Image source: Pexels) Question from Ashley Morgan Sneezing happens for all manner of reasons. Your nose is extremely sensitive so when it is exposed to a change in temperature or small allergic particles like...

What are ‘the bends’?

(Image credit: Mael Balland/ Unsplash)  Question from Howard Salazar Not nice, that’s for sure! Although it’s the oxygen in the air we need to live, air is mostly nitrogen. Normally nitrogen dissolves in our...

How were books printed before computers?

(Image source: Pixabay) Question from Efan Irvine Early printed books were made using a manual printing press. Each page of the book was ‘typeset’ by arranging metal letters, or ‘type’, into words and lines...