Ancient DNA in ice, such as the Ötzi the Iceman (Handt "et al." 1994), or through rapid desiccation, such as high-altitude mummies from the Andes (c.f. Pääbo 1986; Montiel "et al." 2001), as well as various sources of artificially preserved tissue (such as the chemically treated mummies of ancient Egypt). However, mummified remains are a limited resource. The majority of human aDNA studies have focused on extracting DNA from two sources that are much more common in the archaeological record – bone and teeth. Several other sources have also yielded DNA, including paleofaeces (Poinar "et al." 2001) and hair (Baker "et al."
The Scientist (Arrow) an "A-" grade. Morgan Jeffery at "Digital Spy", gave the episode a perfect 5 star rating out of 5. Alasdair Wilkins of "The A.V. Club" graded the episode a 'B'. Mark Rozeman of "Paste" magazine gave a positive review of the episode. The Scientist (Arrow) "The Scientist" is the eighth episode of the second season of the American television series "Arrow", based on the DC Comics character Green Arrow, revolving around billionaire playboy Oliver Queen as he returns to Starling City, after having been shipwrecked for five years, and becomes a bow-wielding, hooded vigilante who sets out to fight crime