A pitch-black cave in the Balkans is home to what researchers say is a singular work of cooperation by two usually-hostile species of spider. By Adeel Hassan Even in a pitch-black cave, what appears ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In the paddy fields ...

(CNN) — In the paddy fields and around the ponds of central China, a common species of orb-weaving spider builds new webs every evening at sunset, allowing it to entrap fireflies that begin to flash, ...

This spider doesn’t run or hide when danger strikes. Instead, it builds a fake version of itself — and predators fall for it.