And you can find fingerprint scanners on everything from high-security buildings to ATM machines and even laptop computers. Let's take a closer look at how they work!Photo: Taking a thumbprint with a handheld fingerprint scanner. The scanning area is on top of the machine (on the left as...
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How does a DNA test work?DNA:Deoxyribonucleic acid(DNA) is a genetic substance with a double helix of proteins and nucleic acid. A nucleotide sequence is formed by the pentose sugar and the nitrogenous base. DNA is found on chromosomes, and each chromosome contains numerous genes that control...
Haunting Work Two Types of Autopsies The forensic autopsy or medical-legal autopsy is the kind you most often see on TV and in movies. "The forensic autopsy spends almost as much time on the external surfaces of the body as it does on the internal surfaces, 'cause that's where evidenc...
How does DNA structure relate to its function? How are proteins and nucleic acids related? What are some similarities between transcription and DNA replication? How does DNA determine the traits of an organism? How is DNA fingerprinting and gel electrophoresis related?
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DNA fingerprinting or DNA profiling Gene science and genetics are rapidly changing the face of medicine, agriculture and even the legal system! In this article, we'll delve down to the molecular level to completely understand how cells work. We'll look at the simplest cells possible:bacteria...
How does iris scanning work in practice?To get past an iris-scanning system, the unique pattern of your eye has to be recognized so you can be positively identified. That means there have to be two distinct stages involved in iris-scanning: enrollment (the first time you use the system, ...
It’s easy to develop a website that can read visitors’ browser history, and that information is a treasure trove for Web marketers. Sure, everybody knows how to delete their browser history and cookies, but who does it regularly? Moreover, did you know that HTML5 offers new ways for ...
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