Scientists watched butterfly wing scales form within the chrysalis.
Some sea creatures have arms, others have tentacles and a few have both. So, what's the difference between these appendages?
A new study claims that a fossil previously believed to be the first known four-legged snake is actually more lizard-like than serpentine.
The U.K. government has included cephalopods and some crustaceans in a new bill that recognizes sentient animals.
Jumping spiders are a diverse bunch. Some are drab, while others sport a dazzling array of colors and patterns. And they really can jump.
The Australian Reptile Park recently welcomed the biggest funnel-web spider that the keepers had ever seen.
The pathogenic fungus Entomophthora muscae doesn't just kill the flies it infects; it also turns males into sex-crazed necrophiliacs.
Venomous fat-tailed scorpions stung more than 500 people after heavy storms disrupted their habitats and brought the deadly arachnids closer to people.
Reference Rather than raising their own offspring, cuckoos have perfected the art of deception.
Hundreds of bear parts and their derivatives, such as bile, have been smuggled into Australia and New Zealand since 2007, including polar bears.
Scientists recently found that a so-called jumping gene may have jumped ship millions of years ago, and taken our tails with it.