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.
The UK General Election – An Explanation for Kids
Every five years, United Kingdom elects a new parliament. This is called a General Election and it’s pretty complicated. If you’ve ever wondered how a country decides who is going to run things, this is how! We asked our contributor Tina Price-Johnson to write an explanation of the General Election for kids.
When I was in Year 9, my school ran a mock general election, so we could learn how an election works. I was chosen to be the Liberal Democrat candidate, and two other students were chosen to represent the Conservative Party and the Labour Party. We didn’t have any other parties at that time!
We had to pretend we were running to be elected as a Member of Parliament (MP), and the other students in the school were the voters. We created posters and learned what each party stood for, so we could debate in front of the whole school and give our speeches. We spoke to students in the hallway, and each of us had a team of other students to help us out. This is exactly what all the candidates for MP in your local area will be doing. More or less!
How Did the Penguin Get its Name?
These days, we all know what a penguin looks like. Even if you haven’t seen a real, live penguin, I’m sure you have seen pictures, perhaps watched them in a film. It seems strange to think that people in Europe had no idea they existed for so many centuries! Perhaps you have wondered about that part of history.
Stories from the Stables Part 2 – Topper. Ouch!
Our Stories from the Stables series from Carolyn Ward continues with a flea-bitten grey with a shocking attitude.
Topper. I swear that pony could scowl.
It was my week to ride him, and I had just hauled him all the way down to the outdoor school and stood him in the middle to check his girth and stirrups. As I reached under to tighten up the girth he turned his head toward me and eyeballed me, then stepped over with his nearside foreleg; and stamped on my left foot.
I hissed a very rude word and frantically pushed him to move him off. My foot sunk into the woodchip surface with his heavy weight crushing it down. By now he was still looking directly at me, so I started punching his shoulder to try and get him to step off. Today’s teacher was a crosspatch I have no fond memories of; if she had found out about it I’d have been bawled out for having my foot in the wrong place or something.