DNA evidence works by comparing DNA found at the scene of a crime with DNA collected from a potential perpetrator. Techniques allow investigators to make a comparison with a tiny amount of DNA. More »

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There is no definitive evidence that lends credence to the existence of Sasquatch, as of 2014. Supporters point to blurry pictures and homemade movies, dubious hair samples, oversized hominid footprints and untestable an... More »

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The theory of evolution is supported by biochemical evidence; many of the same molecules and biochemical processes occur within all living organisms, from single-cell bacteria to humans. Originally, scientists couldn't u... More »

There are two main ways DNA is used to solve crimes: the DNA gathered from a crime scene is compared to the DNA of potential suspects, or the DNA gathered from the scene is run through a database in hopes of finding a ma... More »

DNA fingerprinting is a forensic process that involves extracting DNA from the nucleus of cells and comparing the tiny differences between DNA found on evidence and any suspects. The technique uses results to prove wheth... More »

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DNA works by storing information that tells the body how to develop, survive and reproduce cells. DNA sequences are made up of four types of nucleotides: adenine, thymine, cytosine and guanine. Information in DNA is stor... More »

Ancestry DNA takes a small sample of saliva and uses autosomal testing to find both paternal and maternal ancestors. Most genetic testing focuses on the Y-chromosomes, which are male genetic markers, or on the mitochondr... More »

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