Naked Mole Rat
Weirdness 9/10

The animal that feels no pain and barely gets cancer

This wrinkly rodent feels no pain, almost never gets cancer, and barely seems to age.

📋 Fact File
🐾 Mammal🍽️ Herbivore
📏 Size
About 8-10 cm (3-4 in) long and 30-35 g (about 1 oz)
About as long as your finger
Lifespan
Over 30 years
🟢 Least ConcernSafe and common in their underground tunnels across East Africa.
🤔 Guess first

Which one is REALLY true about the Naked Mole Rat?

The short version

ages 9–12

The naked mole rat lives over 30 years — about ten times longer than a similar-sized rodent — almost never develops cancer, and can't feel certain kinds of pain. When oxygen runs out, it switches its metabolism to run on plant sugar, and it lives in insect-like colonies ruled by a single queen.

📏 How big is it, really?
Naked Mole Rat
10 cm
Naked Mole Rat
a 7-year-old
1.2 m
🧒

You could line up about 12 of them along a 7-year-old!

Why it's so weird

  • The Naked Mole Rat can switch its body to run on plant sugar when oxygen runs out, almost like a plant.
  • The Naked Mole Rat lives over 30 years, roughly ten times longer than any rodent its size.
  • The Naked Mole Rat shrugs off almost every cancer and barely seems to age at all.
  • The Naked Mole Rat cannot feel certain kinds of pain, like acid or the burn of a chili.
  • The Naked Mole Rat lives in colonies ruled by a single breeding queen, just like an ant nest.

The full story

This wrinkly little rodent feels no pain, almost never gets cancer, and barely seems to age. Meet the naked mole rat, one of the strangest mammals alive. It lives over thirty years, which is roughly ten times longer than any rodent its size, and scientists struggle to find them dying of old age at all. Its body shrugs off most cancers, and it cannot feel certain kinds of pain, like acid or the burn of a chili. Even weirder, when the oxygen runs low in its crowded underground tunnels, it simply switches its body to run on plant sugar instead, almost like a plant. And the colony works just like an ant nest, with one breeding queen who bosses everyone else around. Wrinkly, nearly blind, and basically a superhero. Follow for more weird animal facts.

🔬 The science — how & why

When a packed underground burrow runs out of oxygen, a naked mole rat can't make energy the normal way (burning glucose with oxygen). So it flips to a backup plan: it floods its blood with fructose, the same sugar found in fruit and plants, and special "fructose pumps" carry it to the brain. Burning fructose lets cells keep making a little energy without any oxygen at all, so the animal can survive up to about 18 minutes with none. Most mammals, including us, can't do this in the brain because we don't switch those fructose tools on the way mole rats do.

📚 Source: This Surprising Rodent Can Survive 18 Minutes Without Oxygen — National Geographic
🔎 How do we know?

In a 2017 study in the journal Science, researchers put naked mole rats in low- and no-oxygen air and measured their blood and tissues, finding fructose levels shooting up and the GLUT5 "fructose pump" and its enzyme switched on in the brain and heart — while the animals survived 18 minutes of zero oxygen and bounced back.

📚 Source: Fructose-driven glycolysis supports anoxia resistance in the naked mole-rat — Science (Park et al., 2017)
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The Naked Mole Rat can switch its body to run on plant sugar when oxygen runs out, almost like a plant.

The Naked Mole Rat is the heaviest bony fish on the entire planet.

The Naked Mole Rat lives over 30 years, roughly ten times longer than any rodent its size.

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Naked Mole Rat gallery

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