Buoyancy is the upward force exerted by a fluid that opposes the weight of an object immersed in a particular substance. Essentially, this is what Archimedes (c.287 – 212 BC) observed when he stated that:
Continue reading Up Archimedes! – The Principle of Buoyancy
Ten years ago, the discovery of the wonder material – Graphene – was announced. Graphene is thin, stronger than steel, flexible, non-metallic, yet electrically conductive. For all these reasons, graphene promises to transform electronics, as well as other technologies. Because of its potential in industry, researchers have been looking for ways to make defect-free graphene in large amounts.
Continue reading Graphite to Graphene… in a Kitchen Blender
They are found everywhere in Nature. From the leaf arrangement in plants, to the pattern of the petals of a flower, the bracts of a pine cone, or the scales of a pineapple. The Fibonacci numbers are applicable to the growth of every living thing: a single cell, a grain of wheat, a hive of bees, all of mankind. From sunflowers to sea shells, the same recurrent mathematical pattern can be observed in Nature, again, and again, and again…
Continue reading Fibonacci’s Golden Spiral – The Relationship between Maths and Nature
A crisp and perfectly flat white plain lies like freshly fallen snow, 100 kilometres (60 miles) across and 3,600 metres (12,000 ft) up in the remote Bolivian Andes. This hauntingly beautiful place, Salar de Uyuni, could be part of the key to tackling climate change, helping to wean the World away from its love of fossil fuels.
Time-of-Flight Mass Spectrometry is a technique for separating ions of different masses by measuring the time taken to traverse a fixed distance through a magnetic field. Sounds a bit arcane? The technique is used daily by forensic investigative teams to research criminal profiling and provide reliable evidence for the prosecution…
Copper occurs naturally in rocks, as native copper, and the history of its use by the oldest civilisations dates back to at least 10,000 years. These days, copper is in ever increasing demand for its extraordinarily versatile conductive and ductile properties, highly sought-after by the power generation, electronics and communications industries. Remote barren war-torn Afghanistan harbours great stores of the mineral…
The impacts of climate change include a higher risk of flooding and changes to crop yields and water availability. No single country causes climate change, and no one country can stop it. We need to match the urgency of our response with the scale of the science.
The oldest remaining grain of early Earth’s original solid rock crust has now been confirmed to be a 4.374-billion-year-old zircon crystal from Jack Hills, Australia.
Continue reading Earth’s Crust – Could the Jack Hills Zircon be its Oldest Piece collected to date?
A new global monitoring system, Global Forest Watch has been launched that promises “near real-time” information on deforestation around the World. GFW uses information from hundreds of millions of satellite images, as well as data from people on the ground. Despite a greater global awareness of the impacts of deforestation, the scale of forest loss remains significant.
Break a magnet into two pieces, and what do you obtain? What you get, unsurprisingly perhaps, are two new magnets – each one with two sides of opposite polarity. You don’t get a north half and a south half. Back to square one, it seems…