They release "mobile grenades" -- tiny balls of stinging cells that are shaped like popcorn and can swim under their own power.
For tufted golden orb weavers, losing a leg is better than losing their life.
A new study in Vietnam offers hope for a massive freshwater species.
The bigger the whale, the tougher it is to find a decent meal.
A new study shows that the Inuit brought dogs with them when settling North America, and these dogs’ descendants are still working today.