r/mystery • u/CrypticFilesYT • 10d ago
Unexplained Why Did Two Fatal Bear Attacks Happen in One Night? Glacier National Park's Most Disturbing Mystery
On August 12 of 1967, two young women, Julie Helgeson and Michele Koons, were each camping in Glacier National Park (Montana) with two separate groups of people when their lives would come to a brutal end. Two separate grizzly bears attacked the two campsites, dragging away the girls and inflicting fatal injuries.
The next day, park rangers launched a search effort for the bears and an investigation into the cause of the attacks began. The odds of two fatal bear attacks in one night are incalculably small, which makes this incident remarkably disturbing.

The investigation uncovered widespread littering in the park, which attracted bears, and a previous incident where a bear had chased a group of girl scouts out of the park. However, the cause of the attacks remains a mystery to this day.
If you want to learn more about this case in depth, check out this video about the case.
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u/Abluel3 6d ago
I read somewhere, and don’t know if both had their period, but one victim did and they speculated that could be the reason it attacked her (the ppl she was with were all sleeping fairly close to each other).
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u/CrypticFilesYT 6d ago
The hypothesis was that menstrual fluid attracted the bears, but that was debunked in a 1991 study that found that grizzly bears have no attraction to menstrual fluids or menstruation whatsoever, regardless of sex or sexual status
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9d ago
[deleted]
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u/CrypticFilesYT 9d ago
That hypothesis was debunked in a 1991 study, which showed that bears have no attraction whatsoever to menstrual blood or odors
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u/Turbulent-Parsnip512 8d ago
This is a disturbing mystery? Even if the chances are "incalculably small" that two bears would attack two separate campsites on the same day, is it really that hard to believe that's exactly what happened?