It is often a difficult and labour - intensive process to detect tiny fragments of plastic particles in soils, for instance. (sciencedaily.com)
But being able to recover tiny fragments of DNA doesn't change the fact that any sample will contain genetic sequences from more than just the organism of interest. (the-scientist.com)
Their work suggests that the process relies on tiny fragments of RNA in sperm that can pass «echoes» of environmental experience down to future generations. (newscientist.com)