Right now, as you read this, more than 110,000 arachnids are crawling around the world’s largest spiderweb.

The ‘extraordinary’ but skin-crawling discovery was made inside a pitch-black cave on the Albanian–Greek border.

The web stretches 1,140 square feet – about the size of a semi-detached house in the UK – and is home to two species of spider.

One is the Tegenaria domestica, otherwise called domestic house spiders, while the other is the far smaller sheet weaver, Prinerigone vagans. Both live together within a patchwork of webs spread along the wall of a low-ceilinged passage, according to a study published in the journal Subterranean Biology.

The spider lair was discovered in the Sulfur Cave, a chamber hollowed out by sulphuric acid formed when hydrogen sulphide – an egg-smelling g

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