Seals Can Make Big Dives Thanks to Their Big Hearts.

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  • Source:
    Muse. Nov/Dec2024, Vol. 28 Issue 9, p7-7. 1/2p. 1 Color Photograph.
  • Additional Information
    • Subject Terms:
      HEART metabolism; SEA lions; HEART beat; BLOOD vessels; OXYGEN in the body
    • Abstract:
      The article discusses how seals and sea lions can hold their breath underwater for extended periods due to their ability to slow their metabolism and heart rate, as well as their increased blood volume and oxygen-carrying proteins. Recent research has shown that these marine mammals also have enlarged hearts, specifically aortic bulbs, which correlate with the length of their dives. Additionally, the article mentions NASA's Perseverance rover discovering a spotted rock on Mars, named Cheyava Falls, which has sparked interest among planetary scientists as it could potentially provide evidence of ancient life on the red planet. Further testing is needed to determine if the spots on the rock are signs of living organisms or simply mineral reactions. [Extracted from the article]
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