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We’re relying more and more on DNA evidence to catch rapists and murderers, but there’s evidence that psychological bias plays a part in how this evidence is interpreted. Labs aren’t always as objective as we’d like them to be.

Recently, we’ve seen cases where DNA evidence freed innocent people from prisons, but sometimes, contaminated DNA evidence causes police to create a perpetrator in their minds who doesn’t really exist. This happened in Germany in 2007, when some contaminated swabs caused them to search for–as Vaughan Bell writes in the Observer–an "invincible, transsexual, border-hopping serial killer just to keep the story coherent with the genetic evidence."
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Something very profound has happened. The existence of Sasquatch has been confirmed by a DNA study that appears to have been carried out at a high level of scientific competence. It isn’t simply a matter of us having discovered a new species on the Earth. What has been discovered is an intelligent species that is living in a way that is precisely the opposite of the way we live. The potential for a whole new kind of relationship therefore exists, and for both species the chance of embarking on a new journey that is far richer than the ones we have thus far pursued.
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Scientists have discovered a lot of DNA that we don’t seem to have a use for, so they’ve called it "junk" DNA. But now they may be discovering that it’s not just junk, after all. They now think that at least 80% percent of it is active and needed.

The human genome is packed with at least four million gene switches that reside in bits of DNA that scientists now realize play critical roles in controlling how cells, organs and other tissues behave. In fact, complex diseases–from diabetes to depression–may be caused by tiny changes in hundreds of gene switches. It could explain why one person gets a disease, when another (who has been exposed to the same environmental contaminants) doesn’t. This even happens to identical twins!
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