When shopping, swiping a plastic card sounds easier and more convenient than carrying large amounts of cash around. Have you ever wondered about the physics behind this small plastic card?
With the power cuts we have been suffering from, would it not be wonderful if each person generates their own power and not have to rely on the power grid?
The only nearly inexhaustible sources of water—the essence of life on Earth—are the seas and oceans, which, however, are of high salinity.
Being as vast as it is, Earth has quite a diverse geography. Each part is endowed with certain attributes; some are mountainous, others are hilly, some are cold while others are hot; some are wet, others are dry.
The wait could soon be over for hundreds of thousands of people on heart transplant waiting lists as the medical community celebrates the first successful implantation of an artificial heart into a 75-year-old patient in Paris, paving the way for many long term robotic substitutes.