David H. Childress, ETc.

David_Hatcher_Childress is quite the explore, adventurer & researcher.
http://davidhatcherchildress.com, https://www.facebook.com/davidhatcherchildress
Indeed, DHC has travelled seeking out various world-mysteries & legends for several years.
http://www.world-mysteries.com/pex_6.htm

http://www.grahamhancock.com/forum/ChildressD1.php, http://www.grahamhancock.com/news

http://www.bibliotecapleyades.net/esp_autor_hatcherchildress.htm

http://www.goodreads.com/author/show/14864.David_Hatcher_Childress

http://www.ancient-origins.net/david-hatcher-childress-0

Of course, there is an entertainment or showbiz aspect to DHC, but I don't mind this form of speculative entertainment.

However, there are those that are much more critical of DHC.
http://www.jasoncolavito.com/david-childress.html,
http://www.jasoncolavito.com/david-childress--the-aliens.html

Michael S. Heiser provides a tremendous amount of fascinating research & observations.
http://drmsh.com/ufo-religions-2
I'm just too much of an Ancient_Aliens fan, but its also interesting & important to explore various perspectives.
http://drmsh.com/paleobabble/ancient-aliens-debunked 

History.com has provided years of thought provoking entertainment with, www.history.com/shows/ancient-aliens
For many, intelligent life only developed on one world in the universe.
http://ancientaliensdebunked.com
While others consider the possibility of life existing on many kinds of worlds, as old or even much older than the earth.
http://silverscreensaucers.blogspot.co.uk/2013/01/prometheus-did-go-to-zeta-reticuli.html
In either case, there can be a wide spectrum of beings & entities that range from the benevolent to the malevolent end of the spectrum of consciousness.
http://silverscreensaucers.blogspot.ca/search/label/Spielberg

http://silverscreensaucers.blogspot.co.uk/2012/10/alien-human-hybridization-was-predicted.html
After all, some of them might be more interested than just checking you for colon polyps.
http://silverscreensaucers.blogspot.com/2014/05/the-et-that-nearly-was-creature-designs.html

Close_Encounters_of_the_Third_Kind could have just as easily been called, Encounters at Devils_Tower, but that might have implied that the visitors are from the darker end of the spectrum of consciousness.

ET Human Hybrids

http://www.unknowncountry.com/dreamland/special-report-human-hybrid-issue ,
http://www.earthfiles.com/news.php?ID=2210&category=Environment ,
http://www.earthfiles.com/news.php?ID=2212&category=Environment
Bizarre, fascinating & powerful stuff to investigate, but you might not like where this research takes you.
https://www.facebook.com/HybridChildrenCommunity

http://www.ufocasebook.com/ethybrid.html ,
https://www.youtube.com/watch?v=LZ58Sq19KVA ,
http://ufosightingshotspot.blogspot.ca/2013/02/indigo-children-new-human-et-hybrid.html

http://www.ufoabduction.com/faq1.htm , http://www.ufoabduction.com/bibliography.htm

https://c-shapes.blogspot.ca/search?q=Dr.+David+Jacobs

So Who are they? The Historical Evidence: The ET factor, etc.

https://www.youtube.com/watch?v=MyK9g-JXFjI
Its a world and universe full of several kinds of beings at various levels or stages of consciousness.
https://www.youtube.com/user/davidicke

Hans Rudolf Giger: 1940-2014

http://www.hrgiger.com
There are plenty of imitators, but no one has created such dark & mysterious artwork.
http://alienseries.wordpress.com/2014/05/13/thank-you-for-the-nightmares-hans-rudolf-giger-1940-2014

http://www.independent.co.uk/news/obituaries/hr-giger-artist-hailed-for-his-surrealistic-creatures-in-nightmare-landscapes-who-won-an-oscar-for-his-work-on-alien-9365030.html

http://www.washingtonpost.com/entertainment/hr-giger-artist-who-designed-the-creature-in-the-1979-film-alien-dies-at-74/2014/05/13/6818becc-dabb-11e3-8009-71de85b9c527_story.html

H.R. Giger

H._R._Giger was perhaps one of the darkest & most intense artists in history.
http://en.wikipedia.org/wiki/Alien_(film)#Direction_and_design
H.R.G created some very original & unsettling art that remains in a class of its own.
http://c-shapes.blogspot.ca/2014/05/hans-rudolf-giger-1940-2014.html

http://c-shapes.blogspot.ca/2014/05/alien-stage-c.html

ALIEN: Stage C

http://alienseries.wordpress.com/2014/04/10/interview-with-dan-obannon

Some people just might have shit them selves when they first saw ALIEN in the theater.
http://en.wikipedia.org/wiki/Alien_(film)#Set_design_and_filming

http://www.rogerebert.com/reviews/great-movie-alien-1979

http://www.vulture.com/2012/06/44-things-you-probably-dont-know-about-the-alien-films.html

http://en.wikipedia.org/wiki/Alien_(franchise)#Prometheus