Pompeii worms don’t mind the heat.

They’ve adapted to live in hot places.

Hottest Lifestyle

Deep in the Pacific Ocean, there are cracks in Earth’s crust. They release hot lava into the sea. There is no light here. The temperature is scalding hot. This is where the Pompeii worm makes its home. How does it beat the heat? With a winning combination of mucus and bacteria.

The worms cover their bodies with mucus. The mucus is food for bacteria. The bacteria cover the worms as they eat the mucus. Together the mucus and bacteria shield the worms from heat.


Wood frogs freeze solid but don’t die during the winter in Alaska.

Biggest Chill

A wood frog nestles under frozen leaves in Alaska. Winter is coming. The temperature drops. The frog’s heartbeat slows. It takes its last breath and freezes solid. But it’s not dead! North American wood frogs simply take extreme measures to survive.

Most animals die when they get too cold. If ice forms inside their cells, the cells burst. The animal dies. A wood frog’s body produces a high level of sugar in its blood. It acts as an antifreeze. It protects the frog by not allowing ice to form inside the cells. In spring, the frog thaws out.

Most Bizarre Defense

Lying in the desert sand, the Texas horned lizard is motionless. It looks like a spiky rock.

A nearby coyote lifts its nose and smells the air. It turns and spots the lizard. As the coyote approaches, the lizard hisses. It puffs up to look bigger.

The coyote is not impressed. It pounces and pins the lizard to the ground. The lizard launches its extreme defense. As the coyote comes in to bite it, the lizard squeezes blood from its eyes. It squirts it into the coyote’s mouth. Yuck!

The blood tastes disgusting. As the coyote backs off, the lizard runs away!

Some animals use surprising hunting strategies. Others find ways to live in unsafe environments or avoid being eaten. All of these animals rely on extreme adaptations for everyday survival.

Texas horned lizards can really surprise predators. They squirt foul-tasting blood from their eyes.