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Great Women You Should Know… Helen Sharman
Dr. Helen Sharman, the first British astronaut and at 27 the fifth youngest person to be launched into space on the 18th May 1991. Our contributor Annie May Gibbs had the opportunity to meet Dr Sharman and ask her some questions.
What is the Point in Learning Chemistry?
Have you ever sat in a Maths class wondering why you will ever need to be able to do long division without a calculator? Or silently cursed your Geography teacher while learning about the formation of oxbow lakes? And History?
That’s all in the past and irrelevant, isn’t it? In this series of articles we will look at some of the subjects we learn at school, and try and answer the question: What’s the point in learning… Chemistry?
Does Atlantis Exist, and Where Does the Name Originate?
Around 350 BC, the Greek philosopher Plato wrote about an island situated in front of the Pillars of Hercules, that disappeared under the sea in one day and one night. According to Plato, the capital of Atlantis was built on a hill and surrounded by rings of water, which were joined by tunnels large enough for a ship to sail through. A huge canal connected the outer rings of water to the ocean.
The possible existence of the island of Atlantis has intrigued scholars and scientists over the centuries.
In 1800s a man called Ignatius Donnelly wrote a bestselling book called Atlantis, the Antediluvian World. After studying flood history, Ignatius put forward the suggestion that Atlantis was not fiction, but the recording of a natural disaster.
Most modern academics insist that Plato created the story, and was perhaps inspired by events that happened during his lifetime, but that the island never existed.
The subject of dreams, of magical tales and many a search, Atlantis has long captured our imagination. But where did all of this spring from?
Pride of Place – The World of the Lion
Lions are felines, which means that they are members of the same wider family as cats. Indeed, they are frequently referred to as “large cats” or something similar.
They live on plains and savanna in Africa and India, where the sun beats down on the grassland so that it fades, withers and turns yellow – just the colour of a lion, which helps to camouflage it, so that it can blend in with its surroundings and stay hidden.
A Kid-Friendly Explanation of The Big Bang & An Amazing New Discovery by Scientists
Most scientists believe that the Universe began in a Big Bang around 14 billion years ago. The entire Universe was inside a bubble thousands of times smaller than a pinhead, and was hotter and denser than anything we can imagine.
When the explosion called the Big Bang happened, the Universe as we know it was born. In a fraction of a second, the Universe grew from smaller than a single atom to larger than a galaxy. It kept on growing, and is still expanding today.
Now researchers in America think they have found traces left in the sky that prove this that the Big Bang did really happen. It takes the form of a distinctive twist in the oldest light detectable with telescopes. These twists of light are called ‘gravitational waves’ – the effect is a little bit like how waves form on the surface when you drop a big stone in a pond. However, you also have to imagine that the Big Bang formed the pond itself.
The team leading the project, known as BICEP2, has been using a telescope at the South Pole to make detailed observations of a small patch of sky. The aim was to find evidence of ‘inflation’ – the idea that the cosmos grew rapidly in its first trillionth, or trillionth of a trillionth of a second – growing from something unimaginably small to something about the size of a marble.
The leader of the team, Prof John Kovac of the Harvard-Smithsonian Center for Astrophysics said:
“This is opening a window on what we believe to be a new regime of physics – the physics of what happened in the first unbelievably tiny fraction of a second in the Universe.”
Over the coming years, scientists will work hard to investigate every aspect of this discovery. Other experiments will be carried out to see if they can replicate the findings of the American team. If this research is confirmed, it will be one of the greatest scientific discoveries of our time.
EDIT
Dr Sarah Bearchell drew our attention to this video, which explains the concept of gravity and gravitational waves with the help of a towel, an apple and a ping pong ball. Check it out