Today, Earth is home to animals of all shapes and sizes, from nearly microscopic creatures like tardigrades to 80-foot-long (25 meters) blue whales. These organisms have arisen and evolved over ...

Tiny animals are, by their very nature, often overlooked. Most animal enthusiasts know that blue whales (Balaenoptera musculus) are the largest animals, but few are aware of our planet's most ...

Our planet is home to some truly fascinating animals, from creatures that look like aliens to massive mammals and tiny insects. Every animal species on Earth has characteristics and a temperament that ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The story of two of ...

You would think that a spider with legs over a foot wide is the stuff of fiction or nightmares. No, these massive spiders ...

Do animals play a larger role in shaping the Earth’s surface than geological processes like flooding, wind, fire, and landslides? This is what a recent study published in Proceedings of the National ...

Have you ever wondered what the world’s largest land animal might be? While some land animals (giraffes) might be taller, and ...

Scientists believe that at several times in Earth’s history the planet was covered by ice. Science History Images / Alamy Stock Photo This article is from Hakai Magazine, an online publication about ...

It may not be the robots that will rule Earth when humanity goes extinct. Experts say that octopuses are the most likely creatures to take over the world should humanity end — and it’s due to the ...

Many people, including scientists, have argued that all life is somehow interconnected. While some write off these ideas as "fluff" and "unscientific," there is accumulating evidence from detailed ...

Moss quietly collects DNA from animals, plants, and microbes, offering a simple way to track biodiversity without harming ...