The Most Massive Animals Still Roaming the Planet

Tortoise

Colin Kapernick has a pet tortoise named Sammy that weighs 115 pounds. He’s a member of the third largest species of tortoises in the world with a lifespan of 150 years.

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The More You Know

  • The only mammals to undergo menopause are elephants, humpback whales and human females.
  • One species of jellyfish, Turritopsis dohrnii, is “immortal.” In response to physical damage or any other trauma, they can revert back in their development process to a polyp.
  • Sperm whales in the Caribbean have an accent.
  • Hippo’s sweat is pink.
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