| Earth Poles (Artic and Antarctic poles) |
(Tashirev et al., 2012) (Buzzini P, 2013) (Selbmann et al., 2013) |
| Tibetan Plateau (Third pole) |
(Dong and Yao, 2012; Robinson, 2001) |
| Extraterrestrial conditions (i.e. International Space Station) |
(Novikova et al., 2006; Onofri et al., 2008; Onofri et al., 2012) |
| Radioactive polluted areas (i.e. Chernobyl Nuclear Power Plant) |
(Dighton et al., 2008; Ragon et al., 2011; Tesei et al., 2012; Vember and Zhdanova, 2001) |
| Organic and metal polluted areas |
(Ban et al., 2012; Isola et al., 2013; Vicente et al., 2008; Zhan et al., 2011; Zhang et al., 2008) |
| Hypersaline waters |
(Cantrell et al., 2011; Gunde-Cimerman and Zalar, 2014; Gunde-Cimermana et al., 2000; Zalar et al., 1999) |
| Acidic environments |
(Baker et al., 2004) |
| Dry desserts and semi-deserts |
(Durrell and Shields, 1960) (Durrell and Shields, 1960; Jiang et al., 2016) |
| Inside and surface of rocks (i.e. marbles, limestone) |
(Bogomolova and Minter, 2003; Burford et al., 2003; Cappitelli et al., 2007; De Leo et al., 2003; Friedman, 1982; Gorbushina et al., 2005; Gorbushina et al., 1993; Ruibal et al., 2009; Ruibal et al., 2005; Selbmann et al., 2008; Selbmann et al., 2013; Selbmann et al., 2015; Sert et al., 2007; Staley et al., 1982; Sterflinger et al., 1999; Sterflinger and Krumbein, 1997; Wollenzien et al., 1995)
(Diakumaku et al., 1995) |
| Residential washing machines and showers |
(Babic et al., 2015; Thrasher et al., 2012; Zupancic et al., 2016) |
| Deep sea hydrothermal vents |
(Le Calvez et al., 2009; Vandenkoornhuyse et al., 2002) |
