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Winter Wonderings – Are Snowflakes Really All Different?
It’s a common belief that no two snowflakes are the same, and in a way this is true. No snowflake can ever be completely identical to another, because when you get down to the molecular level they will have slightly different kinds of water molecules, different electrons and different traces of other materials such as specks of dust.
However, if we’re talking only about the appearance and shape of a snowflake, then yes it is possible that some will have duplicates. Snow crystals can vary from fairly simple, hexagonal structures to the more complex and delicate shapes that we commonly think of as snowflakes.
The simple flakes have far fewer molecules than their larger cousins and so it’s entirely possible that you could find two that appeared identical when viewed through a microscope. The more complex structures, however, can have more than a hundred different features and each feature can form in a number of different ways. This makes it highly unlikely that you would ever find two large snowflakes that looked the same – but you could have fun trying!
For a more detailed explanation of the science behind the forming of snowflakes, check out this video
Tarragon: the Snake in your Kitchen
Even if you are not a budding chef, you might have heard of this herb. It can be used in all sorts of ways in cooking, especially with chicken, eggs and fish. And if you are fortunate enough to have tried French cuisine, you may have had it in Bearnaise sauce.
But where did the name come from? You might think it looks very English, but in fact, this word has had quite a journey to reach us in the form it is today in English.
“Tarragon” first appeared in this form in the 1530s, but it came from an earlier English form; taragon. This was formed from the Middle French term targon, which came from Medieval Latin tragonia. But the story doesn’t end here. There is an intriguing twist in the tale.
Who Was Tony Benn?
You might not have heard of Tony Benn, but his life and work helped define the country in which Jump! Mag is based – United Kingdom. A towering figure of British politics, he worked for over 60 years, first as Member of Parliament for Bristol South East and later Chairman of the Labour Party. Even after leaving parliament, he continued to make his views known, and was an extremely popular politician, both among Labour voters and supporters of other political parties.
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.
Being an Expat – The Best of Both Worlds
Being an expat is not the easiest thing in the world, but it’s certainly is one of the most interesting and enriching experiences one can have. Alexia moved from Athens to London in September 2012, and is still trying to figure out expat life, armed with optimism, patience and lots of enthusiasm. She explains how she finds life… here and there.
Here: I meet new people all the time and develop great friendships with people from all over the world. I’m more open socially than I was back home.
There: Although I miss them terribly, I’m so happy every time I go back home and see my old good friends and my family. Every reunion is filled with lots of hugs and happiness.
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London’s landmark, Big Ben |