In 1864 the French author, Jules Verne, published his novel “Journey To The Interior of the Earth”. In this book 3 men explore volcanic tunnels that lead miles beneath the Earth’s surface, and have a number of strange encounters along the way. One of these is the discovery of a massive ocean, deep underground. Now, 150 years later, it seems that Monsieur Verne’s imagination may have been more accurate than he knew.
An enormous reservoir of water, roughly 3 times bigger than all of the Earth’s oceans put together, has been detected 400 miles below the surface. The water is trapped inside a layer of blue rock called ringwoodite, in the layer of hot rock between the Earth’s core and its surface) that is known as the mantle.
What is Geocaching? It’s like a real-life treasure hunt and is a great way to make a walk in the woods just a bit more interesting!
Julianne Robertson explains what it is and how to do it.
What is it?
Players use a handheld GPS device or a smartphone to look for a set of co-ordinates near to wherever they are and find the geocache (or treasure!) hidden at that location. These are usually a small container of some kind with a logbook and ‘treasure’ inside – this can be anything, like a little toy, some stickers, a badge, a pretty stone – basically anything small enough to fit inside and be worth finding!
Sounds good! How do I get started?
Go to the website www.geocaching.com and register – it’s free to sign up. Then you put in your postcode and you should see a list of all the geocaches near to where you live. Choose one and you’ll get the co-ordinates you need to put into the GPS, as well as a description of the area and clues about how to find the cache.
Are geocaches always hidden in the woods?
No – there are geocaches all over the world and they are usually put in places which are important to the person hiding them. Some are hidden in forest areas, others are in local parks, or city streets – even underwater! There are also different sizes of geocache and a range of difficulty – you should probably start with one that’s easy, at least to begin with!
What do I do when I find one – can I keep the treasure?!
Yes, but you should replace anything you keep with something of equal or greater value. You should also write about your find in the logbook and when you get home log your experience on the website too, so that others know the cache is still active.
Can I hide my own cache for others to find?
Yes, once you’ve found a few caches you’ll know what makes a good geocache and hiding place, and you might want to create your own! There are lots of guidelines on the website about how to do it.
Now you know about geocaching – go and try it! It’s a great activity to do with your family or a group of friends. Once you’ve found one, you’ll want to find more!
Julianne Robertson is a freelance journalist, based in Dundee. Her background is radio news, and she now writes features and reviews, specialising in parenting, faith and religion, events and lifestyle issues.
One of the best known landmarks in Bristol, UK, the Clifton suspension bridge first opened in 1864. It was built by the famous British engineer Isambard Kingdom Brunel, but it has recently become public knowledge that it was designed by a woman. Our science editor Sam Gouldson explains who she was and why her work isn’t more widely known.
The Clifton suspension bridge was designed by a woman called Sarah Guppy. She was born Sarah Beach in 1770, but when she married her husband Samuel Guppy she took his name. She was one of the great British inventors of her time and the bridge isn’t the only thing she came up with.
The invention that earned Sarah the most money was her device to prevent barnacles forming on the hulls of ships. Without barnacles the ships would be able to cut better through water and travel more quickly, and the Royal Navy paid her £40,000 for it. That may not sound like much for such a valuable design, but today it would be more than £2.3 million. Her other inventions included a kettle that not only boiled water for tea but could cook an egg and keep toast warm, a candle holder that could keep candles alight for longer and a way of treating boats so that they were more watertight. She also came up with the idea of planting willow and poplar trees on the embankments of new railways, to hold the earth together and prevent landslides.
Sarah lived during the Georgian and Victorian eras. In those times married women weren’t allowed to own property in their own name, and intellectual property such as Sarah’s inventions were no different. Her husband had to file the patents on her behalf, as the property of the Guppy family. The patent for her method of piling bridge foundations in order to create a new kind of bridge was filed in 1811, but she refused to charge others to use the idea because she felt it was for the benefit of the public. Thomas Telford, a civil engineer, used her design to build the Menai bridge in 1826, and when the competition to design the Clifton bridge was announced Sarah gave her work to Brunel. When she wrote to him to suggest the use of willow and poplar trees to reinforce railway embankments, she explained that she didn’t want the credit for her idea because she felt that women “must not be boastful”.
