Are you worried about radioactive granite countertops? Gorgeous kitchen counters often do radiate radon, but the levels are low and probably not hazardous.
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The Chemistry of Fireworks
Interested in pyrotechnics? The beautiful colors and effects of fireworks are due to the chemical reactions between elements, heat and oxygen.
Ammonia: The Chemical at the Center of Texas Fertilizer Plant Explosion
What is anhydrous ammonia – and why did the chemicals involved make the Texas fertilizer plant explosion as bad as it was?
Earth Chemistry at a Glance for Earth Day
Explore our planet’s chemistry and composition in celebration of Earth Day. Chemical elements make up the crust, mantle, and core – do you know which ones?
The Fibonacci Series, Phi, Shapes, and Numbers: Sacred Geometry in Nature and Culture
For eons, human beings have felt that certain numbers, ratios, and shapes have sacred significance. For instance, the number ‘7’ has had great significance in various aspects of many cultures, geometric shapes have been associated with numbers, and the Fibonacci series and Golden Ratio are still instrumental in everything from Art to Music. Sacred Meanings in Geometric […]
Andreas Vesalius and De Humani Corporis Fabrica
Andreas Vesalius was a Belgian physician, anatomist and teacher. He is the founder of modern human anatomy, and is famous for his textbook Fabrica, considered the greatest medical book in his time. The actual name of the book is De humani corporis fabrica (On the Fabric of the Human Body), written in 1543. In the […]
Uses of Sodium: The Salt in our Lives
Sodium is a soft, light, silvery metallic chemical element. It is extremely reactive and is never found naturally as pure sodium, thus, it combines with other elements. Sodium changes color at high pressures. At a glance, and in Mendeleev’s Periodic Law of Elements, sodium belongs to category alkali metal, it has the symbol Na, and […]
CT Scan: Computed Axial Tomography (CAT) Scan
Engineer Godfrey Hounsfield and physicist Allan Cormack invented the “computed tomography” (CT) scan. Also known as a “computed axial tomography” (CAT) scan, it allows doctors to see the soft tissues inside the body, unlike the conventional X-ray that only allows the outline of bones and organs to be seen. As it uses a computer to […]
Theory of Valence Pioneer: Edward Frankland
Sir Edward Frankland was one of the foremost English chemists of his day. He laid the foundation of modern structural chemistry through his discovery of the theory of valence, which states that atoms come together to make chemical compounds in regular ratios. He also introduced the term “bond” to describe the way that atoms link […]
Christiaan Huygens: Discovered Saturn’s Rings
Dutch astronomer, mathematician and physicist Christiaan Huygens is famous for his invention of the first accurate pendulum clock, as well as his discovery of the rings of Saturn and its largest moon, Titan. He also founded the wave theory of light known as “Huygens Construction,” which he outlined in his Treatise on Light. Early Life […]