Sally-Anne was out and about in Australian, and took us along on a virtual trip. She shared her first impressions of the country, and then her love of the city of Melbourne.
In this report, she explains why she went to Australia alone, and what it is like to travel without companions.
If you’ve been reading some of my reports from Australia, you’d be forgiven for wondering why I haven’t mentioned any of the people I’m travelling with. That’s because there isn’t anyone, I’m on this trip all by myself. I wasn’t too worried before I came because I’m quite used to doing things alone. I live in my own flat, I went to a different high school to everyone I knew from primary school and I quite often go and visit places by myself, but I’d never travelled alone. In fact, I’d never been outside of Europe at all, even with other people, so the whole trip was a bit nerve-wracking, if exciting.
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
No, Tina didn’t turn into the cute little furry rodent (although that would be awesome) but became a ‘subject of scientific research’. Find out what that means, and what she had to do!
If you ask people if they know the name ‘de Mille’, some will say they’ve heard of Hollywood producer Cecil de Mille, some might even know his brother William de Mille, but not many will have heard of William’s daughter. Which is a shame, because Agnes De Mille was a fascinating woman.
Throughout history girls and women have been told, ‘You can’t do that! You are a girl!’ Luckily, this attitude is becoming less common in many countries and cultures, but what did women do in the past? If they wanted to be a doctor, a musician, a sportsperson or even a soldier?
Most women put aside their dreams or practised other activities that were deemed appropriate for women. Some women protested, like the suffragettes who demanded to be allowed to vote. And a small number of women went much further. Today we are taking a look at the women who disguised themselves as men in order to follow their dreams.
The first woman to circumnavigate the world – to go all the way around the globe. Born in France, and with an interest in botany (the study of plants), Jeanne became first the housekeeper, and later the partner of a famous botanist Philibert de Commerson.
