A cave straddling the border of Greece and Albania has just yielded an absolute treasure trove of spiders.

There, in the depths of Sulfur Cave, a team of scientists has discovered what they think might be the largest known spider web in the world – a shimmering silken sheet spanning a surface area more than 100 square meters (1,077 square feet).

Within that pearlescent palace reside more than 100,000 spiders of two different species: 69,000 individuals of Tegenaria domestica , the barn funnel weaver, and 42,000 individuals of Prinerigone vagans , the sheetweb spider.

It's the first documented case of true colonial web formation in both of these species, says a team led by arachnologist István Urák of Sapientia Hungarian University of Transylvania.

Not only do they have unique

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