Deep inside a sulfur-filled cave on the border between Greece and Albania, scientists have discovered what is believed to be the world’s largest spider web — an enormous, interconnected network woven by around 111,000 spiders.

Spread across roughly 1,140 square feet (about 106 square metres), the web covers the walls and ceiling of the cave’s narrow passage, forming what researchers are calling a true “spider megacity.” The colony is composed mainly of two species — the common house spider (Tegenaria domestica) and the sheet-weaver spider (Prinerigone vagans) — which are typically solitary. Yet, inside this dark, sulfur-rich cave, they have adapted to live and hunt together.

The secret behind their massive web lies in the unique ecosystem of the Sulfur Cave. Instead of sunlight, life her

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