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...based on available resources. Will regular tests to control cancer progression be still offered? Some patients depend on regular tests to monitor the progression of their cancer and/or the efficacy of their treatment. One example is for prostate cancer, where prostate specific antigen (PSA) tests are employed for cancer detection and for post-treatment monitoring to...

...based powder is injected into the oxygen stream. Cutting torches can be hand-held, but are frequently used in conjunction with high precision, numerically controlled guiding machines. Production rates depend on material thickness and composition, nozzle design, oxygen pressure and purity and “quality” of cut required. Production rates can be improved by “stock...

...based on aluminium, nickel, stainless steel, titanium and zinc are available commercially, and of these the most commonly used are aluminium, titanium and stainless steel (e.g. Supral 100 (Al—6Cu—0.4Zr): temperature range 450–500˚C, m value 0.5; titanium 318: temperature range 850–950˚C, m value 0.7–0.9). Alloys are being developed that are superplastic at...

...based primarily on mass or size. Pluto is one of many Since the 1990s, many other roughly Pluto-sized bodies have been discovered beyond Neptune, such as Eris, Huamea and Makemake. There are more than a thousand objects now documented in what is called the Kuiper belt, a region beyond Neptune where it seems no large objects were able to form. If Pluto had been discovered...

...based on damage occurring to the body’s fast-growing cells: bone marrow – a drop in number of blood cells causing tiredness gastrointestial cells – causing vomiting and nausea follicular cells – causing hair loss. Detecting polonium Due to polonium’s high radioactivity, it is usual to detect it by making use of the way it decays. The speed (energy) of alpha...

...with a red ‘X’. A close up of the landing site and the Eagle lunar module can be seen at this website. [Clavius - Alan Cayless' images] Panorama of tranquillity base, showing little West crater. Image Credit: NASA, moonpans.com With thanks to Isaac Asimov, whose story “The Key”, published in Asimov’s Mysteries (Asimov, 1969), inspired part of this article....