Juergen Freund / Paralytic tick (Ixodes holocyclus) with engorged body on human hand, this species affects many species, Spectacled flying fox (Pteropus conspicillatus) among them and infects them with a toxin that ca...

Pete Oxford / Konyak Naga tattooed head hunter. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Tim Laman / Huli 'singsing' dance ceremony. Huli wigmen wearing human hair wigs and feathers of various birds of paradise and other bird species. Tari Valley, Southern Highlands Province, Papua New Guinea. Novem...

Daniel Heuclin / Mosquito (Anopheles gambiae) feeding on human in controlled conditions. The body is becoming engorged with blood. Malaria vector. Africa, June. Engorging sequence 2 of 3. Model released

Suzi Eszterhas / Polar Bear (Ursus maritimus) three to four month old cub peeking over mother's body while she is tranquilized by researchers, vulnerable, Wapusk National Park, Manitoba, Canada

Solvin Zankl / Leafcutter ant {Atta sp} carrying leaf fragment to nest. Ants are champion weightlifters, capable of lifting 50 times their body weight (the equivalent of a human heaving 50 people). They would win a...

Paul D Stewart / Woodblock illustration of Mandrake (Mandragora) from two pages of the Ortus (Hortus) sanitatis - translated from the Latin as 'Garden of Health' by Jacob Meydenbach, 1491. He describes plants and anim...

Eric Baccega / Himba woman applying Otjize (a mixture of butter, ochre and ash) on skirts made from goat skin whilst breastfeeding. Marienfluss Valley. Kaokoland, Namibia October 2015

Dong Lei / Caterpillar fungus (Ophiocordyceps sinensis) held in human hand. This fungus parasitizes caterpillar under the ground and produces fruiting body above the ground. Mount Namjagbarwa, Yarlung Zangbo Gra...

Pete Oxford / Konyak Naga tattooed head hunter. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.