There was some brief mention of "black goo" at QResearch, which reminded me of this old interview.

Here is my description of it, from 2015:

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This subject is quite bizarre and I have never quite decided whether it is believable or not. It is reminiscent of some X-Files episodes and the movie Prometheus. It is the strange tale of an intelligent "sentient oil" or "black goo" was it is claimed was found after destruction of a "Blue ET" base on Thule Island, southernmost of the South Sandwich Islands in the far South Atlantic, about 1200 miles west of Bouvet Island. (see map of South Atlantic at end.)

This mysterious fluid could allegedly communicate telepathically with humans and alter their DNA. It is claimed that military researchers attempted to use this substance to create "super soldiers", but the project was found to be too dangerous and was scrapped. Here are two interview playlists of about 4 hours each on the subject.

The 4-part interview describes research into the origins and implications of the material and the clandestine research allegedly conducted on it.

Playlist (about 3hr 15min, embedded below):
https://www.youtube.com/watch?v=BCJSKhtTtC0&feature=youtu.be&list=PL3ZLFYWSWQOqt-Y_sCwIPlJhQPSa_hfke

Components of the playlist:
Parts 1 & 2 (about 1hr 35min:

https://www.youtube.com/watch?v=BCJSKhtTtC0
Part 3 (about 40min):
https://www.youtube.com/watch?v=fsEsMTHDHC0
Part 4 (about 1 hr):
https://www.youtube.com/watch?v=8Lz-lFoCTfY

Description from YouTube:
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YouTuber: Miles's Bases Project
Published on Aug 24, 2012

In this re-upload of the ET Falklands War ET connections, David Griffin of Exopolitics UK sets the stage for the details of a Blue ET-Base on Thule Island south of the Falklands, the Black Goo or Gray Goo, an "intelligent oil" allegedly leading to the deaths of many staff at MARCONI in the UK.

The claim is from abductees that the Argentine Government had a Blue ET base on Thule Island, which was destroyed by a team of SBS and SAS commandoes.

The problem being an intelligent black fluidic substance, illustrated in the X-Files and Prometheus films. This extremely dangerous "Intelligent & Aware" substance, was removed from the base, and given to Marconi communications company, so it is claimed, which resulted in many deaths and murders of Marconi scientists, computer programmers and other staff in the early 1980s.

This leads in the Gulf Oil spill in parts 3 and 4.
A special presentation of the AMMACH Project, ExopoliticsUK and Underground Video UK
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Map of South Atlantic:

Expanded map of South Sandwich Islands (Thule Island at bottom):