Since so many people are sharing their 'discoveries' on the net here, I thought I'd bring something that I found to your attention:
It comes from the 'urban legends' section of the About.com site and apparently is getting sent around as an email. Though it is disturbingly realistic, it is an artistic creation (a 'sculpture') meant to blur the line between humans and animals.
http://urbanlegends.about.com/library/bl_half_human.htm
Netlore Archive: Circulating via email, an unsettling photograph of what appears to be a half-human, half-animal creature suckling her hybrid offspring.
...
The strange, half-human creatures in the image above are neither real nor a hoax; they are part of a sculpture by Australian artist Patricia Piccinini entitled "The Young Family," which, in turn, is part of a larger installation called "We Are Family," described by Jane Silversmith of the Australian Council for the Arts as an exploration of "the changing relationship between what is considered natural and what is considered artificial."
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Maybe this Patricia Piccinini would make a good 'special effects' person for movie aliens?
She also has her own site with more pictures of other works.
http://www.patriciapiccinini.net/
Many of these are also both fascinating and disturbing at the same time.