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Hammerhead Worms Are Toxic, Invasive and Even Cannibalistic

animals.howstuffworks.com/animal-facts/hammerhead-worms.htm

Hammerhead worms are toxic but not particularly dangerous - unless, of course, you eat too many of them.

The Largest Bird of Prey: Tallest, Heaviest and Widest Wingspan

animals.howstuffworks.com/birds/largest-bird-of-prey.htm

The largest bird of prey is a raptor that dominates the air with its massive wingspan, incredible strength and razor-sharp talons. The biggest birds aren't just impressive because of their size; they're also some of the most powerful predators in the avian world, from the highest peaks of South America to the vast forests of Asia.

Pistol Shrimp: The Fastest Gun in the Sea

animals.howstuffworks.com/marine-life/pistol-shrimp.htm

The pistol shrimp is feared in the ocean for its ability to hit a prey with air bubbles that travel 82 feet per second, pop at 218 decibels and deliver 8,000 degrees Fahrenheit of heat.

The Biggest Frog in the World (Plus 11 Massive Contenders)

animals.howstuffworks.com/amphibians/biggest-frog-in-the-world.htm

You might think frogs are small, croaky critters, but the biggest frog in the world could surprise you. Some amphibians grow to sizes that rival house pets. In this list, we're leaping into the world of giant frogs, examining the species that top the charts in length and weight.

How Many Animals That Start With 'A' Can You Name?

animals.howstuffworks.com/animal-facts/animals-that-start-with-a.htm

Animals that start with "A"? Absolutely amazing! The animal kingdom is filled with fascinating creatures, and today we’re diving into a world of animal names that start with the letter "A." From giant mammals to tiny insects, there’s a whole spectrum of wild wonders to explore.

12 Nocturnal Animals: List of Creatures That Thrive at Night

animals.howstuffworks.com/animal-facts/nocturnal-animals-list.htm

When the sun goes down, an entirely different set of creatures comes to life. This nocturnal animals list highlights some of the world’s most amazing night animals, from skilled hunters with heightened senses to creatures that use the cover of darkness to avoid predators.

Axolotl Life Expectancy Is Roughly Halved in the Wild

animals.howstuffworks.com/amphibians/axolotl-life-expectancy.htm

Axolotl life expectancy might not sound like a burning topic, but once you learn what these amphibians can do, you’ll be hooked.

Can You Name All of These World Heritage Sites?

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We only have one Earth, and the easiest way you can show your appreciation for it is by recognizing its brilliance. Some of the world's most endangered animals, oldest cities and rarest land formations are protected in World Heritage Sites around the globe. Put your skills to the test and see if you can recognize them all.

How Biofilm Works

science.howstuffworks.com/life/cellular-microscopic/biofilm.htm

Biofilms form when single microorganisms attach to a hydrated surface and undergo a "lifestyle switch." Learn about biofilms in this article.

Doomsday Clock Now Closest It's Ever Been to Midnight

science.howstuffworks.com/environmental/earth/geophysics/doomsday-clock.htm

The Bulletin of Atomic Scientists moved the Doomsday Clock to 90 seconds before midnight, the closest it's ever been to global catastrophe. What does this mean for humanity?

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