Kolam designs are an essential part of Pongal, symbolising prosperity, gratitude, and festive joy. As homes prepare to welcome the harvest season, creative patterns take centre stage at entrances and ...

Quantum dots — semiconductor nanocrystals that have custom designable optical properties — are opening up opportunities in the bio-imaging, display and lighting sectors, reports Duncan Graham-Rowe.

Quantum dots are crystals of a fluorescent semiconductor material with a diameter of as few as 10 to 100 atoms (2-10 nm). They are used as labels for imaging molecules because of their very narrow ...

What are polka-dot nails? Polka-dot nails are, unsurprisingly, exactly what they sound like. The manicure features any color nail base (or even a French manicure base) with polka dots on top. The ...

Do you like buses, or do you just like the flippy-flappy displays they use to show route information? Either way, you’ll probably love the flip-disc clock created by [David Plass]. The build is based ...

Learn the benefits and risks of options and how to start trading options Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Samantha (Sam) Silberstein, CFP®, CSLP®, ...

Dot and cross diagrams help us to model when ions are formed from atoms. Here’s an example using sodium and chlorine. They form ions which bond to form sodium chloride. 2. Work out how many electrons ...