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Science, Nature and Tech

A Trip to Mars!

Imagine being able to catch a flight to Mars as easily as we travel to another country – that was the idea behind the Trip To Mars session I attended at the Cheltenham Science Festival. It was conducted by Dr Suze Kundu and Dr Simon Foster and presented as a pre-flight safety briefing, with both of them dressed as pilots! There were a lot of humorous moments and sci-fi references but also some great science.

Suze and Simon suggested that in the future, flights to Mars could be far quicker than they are now, and explored how some of the bigger problems could be overcome. For example, the Sun’s magnetic field deflects a significant proportion of the cosmic radiation that could be harmful to humans on Earth; as spaceships travel further away from the Earth and Sun they will have less protection because the magnetic field weakens. To combat this it’s possible that spaceships will contain or be covered with large and powerful magnets, to produce the same deflective effect. This would have the added advantage of also deflecting radiation from solar flares.

Spaceships journeying to Mars would travel at such speed that even tiny fragments of rock and dust could be damaging to the hull. To combat this, and also the heat generated when the spaceship passes through an atmosphere, Suze and Simon discussed the possibility of spaceships being coated in aerogel. This amazing material is a solid formed from silicone dioxide but is 98% air; this means that it is extremely light but also strong. Its melting point is 1,200°C (equivalent to asbestos) and it is a wonderful insulator. Because it consists of large pockets of air between thin layers of silicone dioxide, any dust or rock fragments that hit it would be slowed and stopped before they could penetrate the aerogel completely.

Suze and Simon also discussed the possibilities and problems with cryostasis. Theoretically this is when a person’s body is cooled to temperatures so low that they enter hibernation, ideal for long journeys through space. Unfortunately our technology isn’t advanced enough to do this at the moment; any attempt would result in the cells rupturing and the person dying. But in the future it will be possible, perhaps after the person’s DNA has been altered slightly so that they can produce antifreeze proteins like some species of wasps and turtles.

Language & Literature

Shooting stars, Weather, and Rocks falling from the Sky!

What do shooting stars, weather and rocks falling from the sky have in common? Are you wondering whether we have gone mad asking such a question? Do rocks ever fall from the sky? Of course they do! You might know them better as “meteorites”, and they are meteors, or rocks from outer space, that fall down to the earth. And what does that have to do with weather? It’s not like they come down like rain! And before you say to yourself “meteor shower”, remember that a meteor is actually a shooting star, a space-rock that burns up in the Earth’s atmosphere. Related, yes, but weather, no.

The weather connection is through another word, generally used to mean “study of the weather”. That word is “meteorology”. As you can see, all three have something in common – the word “meteor”.

So what is this word, and how did it come to mean these different things?

Meteor came into English through French in the late 15^th century. In French it was meteore. Very similar, you might think. Does this mean that it is a French word. Not at all. The next question we must ask ourselves is where did French get it from? The answer is from Medieval Latin meteorum, which meant “things in the heavens”. But this is not the end of the tale. Latin took the word from ancient Greek, and in Greek we can analyse the word to see what it really means.

The Greek word μετέωρα (meteora) can be broken into two parts: meta, which means “over, beyond” and aora, which comes from the verb αείρω/ αίρω (aeiro, airo), which meant “to raise, lift up”. Even today, in Modern Greek, αιωρείται (aioreitai) means “it hovers”. All this means that the original meaning of the word was “thing that is raised in the air”. And even in ancient times this developed to mean “things in the sky” and gradually came to have the meaning it does today.

Another interesting point is that the word “air” is in fact from the same root as αείρω (aeiro), which makes it a distant cousin, or cognate, of “meteor”.

Did you know:

One of the largest and most famous meteor craters is to be found in northern Arizona, desert of the U.S. It is 1,200m wide, 170m deep and calculated to be created 50,000 years ago! It is more commonly known as the Barringer Crater.

Title Photography: Mike Lewinski 2013

Amanda Scheliga 2007

Science, Nature and Tech

Help A Hedgehog

Gretta is a freelance journalist who blogs at mumsdotravel.com. She and her family are worried how the local wildlife are coping with the lack of water. Strange as it may seem in a country that is famous for rain, there has not been enough of it in the past years in UK.

Read on to find out how to help hedgehogs and other wildlife.

Art & History

Falconry and the Tudors

When you write a book that is set in a particular period of history, it is important to get the details correct. This means that writers of historical fiction have to do a lot of research.

The first scene of Katharine Edgar’s novel, Five Wounds takes place on a hillside in sixteenth century England, where her heroine, Nan, is hoping to see her young merlin falcon make its first kill. Katharine had find out all about falconry and the Tudors – the keeping and training of falcons, and other birds of prey.

When I showed the first scene of Five Wounds to some writing friends, some of them asked a question I wasn’t expecting. ‘How rich is Nan’s family? They live in a big house so why does she need to hunt for food?’

Good question!

Science, Nature and Tech

Things that make you go poo….

After talking about bones in my last article, I thought I’d go on to talk about poo, or at least how it’s made.

I like eating. I think a lot of people do. Biscuits are a particular favourite…chocolate Bourbons especially. But how do we get from biscuit, or apple, or stick of celery to the brown stuff we call poo.

Well, it’s thanks to the digestive system, which starts at the mouth, and runs all the way to our bottoms. So let me take you on a guided tour.