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Old 10-07-2020, 06:42 PM
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gary is offline
Join Date: Apr 2005
Location: Mt. Kuring-Gai
Posts: 5,524
Originally Posted by glend View Post
I always believed you needed a certain mass to develop a black hole. A grapefruit sized black hole? Sounds impossible.
Hi Glen,

Hypothesised primordial black holes are remnant bits of matter that
collapsed back in on themselves shortly after the Big Bang.


They had at one point been a Dark Matter candidate but a Japanese
research group claimed last year they had proven they can't :-
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