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Because of [[quantum mechanics|quantum-mechanical]] phenomena involving Hawking Radiation, discussed later in the article, black holes must emit radiation and thus are a logical contradiction at the microscopic level.

Because of [[quantum mechanics|quantum-mechanical]] phenomena involving Hawking Radiation, discussed later in the article, black holes must emit radiation and thus are a logical contradiction at the microscopic level.

Black holes have never been directly observed, and there is no direct evidence for their existence.  Even believers in black holes should admit that there are far fewer than predicted by theory, and they lose credibility when they fail to address that undisputed truth.  They will cite evidence of observations of radiation from accretion disks, motion of stars near the center of the galaxy, and "gravitational lensing," around places where there are no visible objects.  But at most the evidence for the existence of black holes is circumstantial, with heavy reliance on speculation.

Black holes have never been directly observed, and there is no direct evidence for their existence.  However, scientists have observed several factors, including a black hole sucking matter from a nearby star, in a binary system. Even believers in black holes should admit that there are far fewer than predicted by theory, and they lose credibility when they fail to address that undisputed truth.  They will cite evidence of observations of radiation from accretion disks, motion of stars near the center of the galaxy, and "gravitational lensing," around places where there are no visible objects.  But at most the evidence for the existence of black holes is circumstantial, with heavy reliance on speculation.

Black holes are conceptually associated with "[[wormhole]]s",<ref name="nytimes.com"/> which never caught on with the public, perhaps due to its unattractive terminology.

Black holes are conceptually associated with "[[wormhole]]s",<ref name="nytimes.com"/> which never caught on with the public, perhaps due to its unattractive terminology.