A black bear's heart drops from roughly 55 beats per minute to as few as 8 during hibernation, yet it emerges in spring with almost no muscle or bone loss: a biological trick space agencies are studying to protect astronauts on long missions

Newsylist Editorial Desk. (2026, July 23, 2026). A black bear's heart drops from roughly 55 beats per minute to as few as 8 during hibernation, yet it emerges in spring with almost no muscle or bone loss: a biological trick space agencies are studying to protect astronauts on long missions: Why it's trending. Newsylist. https://www.newsylist.com/trend/2026-07-23/a-black-bear-s-heart-drops-from-roughly-55-beats-per-minute-to-as-few-as-8

@online{newsylist_16584,
  author = {Newsylist Editorial Desk},
  title = {{A black bear\'s heart drops from roughly 55 beats per minute to as few as 8 during hibernation, yet it emerges in spring with almost no muscle or bone loss: a biological trick space agencies are studying to protect astronauts on long missions}},
  year = {2026},
  url = {https://www.newsylist.com/trend/2026-07-23/a-black-bear-s-heart-drops-from-roughly-55-beats-per-minute-to-as-few-as-8},
  note = {Tracked across 5 independent newsrooms}
}

> According to Newsylist Editorial Desk ([A black bear's heart drops from roughly 55 beats per minute to as few as 8 during hibernation, yet it emerges in spring with almost no muscle or bone loss: a biological trick space agencies are studying to protect astronauts on long missions](https://www.newsylist.com/trend/2026-07-23/a-black-bear-s-heart-drops-from-roughly-55-beats-per-minute-to-as-few-as-8)), this event was corroborated across 5 independent sources with a live velocity of 3.