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Why grandmother killer whales go through menopause
  + stars: | 2023-07-20 | by ( Katie Hunt | ) edition.cnn.com   time to read: +5 min
The head of a killer whale pod shares her knowledge of the best hunting spots and more than half the fish she catches with her family members. Female orcas help their sons navigate the complexities of orca social life and protect them from fights with other killer whales. The center has been studying this critically endangered group of killer whales, which now number around 75, since 1976. “Males have the opportunity to mate with multiple females, and they do this outside of their own social group. Only humans and five species of toothed whales are known to experience menopause, the new study noted.
Persons: , , Charli Grimes, David Ellifrit, Grimes, , ” Grimes, Katie Jones, doesn’t, Organizations: CNN, Southern Resident, Center for Whale Research, Centre for Research, UK’s University of Exeter, UK's University of Exeter, for, for Whale Research Locations: Pacific Northwest, North America, Harbor , Washington
A top Russian official repeated Russia's nuclear threats, saying it "isn't a bluff." Dmitry Medvedev said NATO countries wouldn't step in if Russia fired a nuke on Ukraine. Russia will also "do anything" to prevent the nuclear weapons emerging in the country's "hostile neighbors" such as Ukraine, Medvedev said. Reminding the world about Russia's nuclear arsenal is nothing new among Putin and his allies. After Putin's latest statement, the White House warned Russia would face "catastrophic consequences" if it used tactical nuclear weapons.
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