[Elsie]

Extraterrestrial object(S) with a three-mile girth(s) ... do NOT explode, they just keep barreling on!!

Only small things can heat up sufficiently in the atmosphere to do this.

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A much smaller object burst in the air over Siberia in 1908...

[jpsb]

A little confusing isn’t it. I kinda got the impression that the comet impacted a ice field near the great lakes, even thou the article stated exploded in the atmosphere. Maybe he/sho considers ice a mile or more high atmosphere? LOL.

[Mr. Jeeves]

Extraterrestrial object(S) with a three-mile girth(s) ... do NOT explode, they just keep barreling on!! Only small things can heat up sufficiently in the atmosphere to do this.

True, but a comet isn't solid like an asteroid, so if it hit at a shallow angle much of it could have burned away in the atmosphere and ground impacts could have been limited to much smaller fragments.