It's not just the dazzling colours and slick moves of Australia's dancing spiders that make them special.
There are more than 100 different species of the peacock spider, whereas most animals have only five or ten.
Researchers believe that's partly down to the spider's 'dark DNA' - a mysterious part of the animal's genetic code, and they are studying it to find out more.
They think that this dark DNA might enable it to adapt rapidly to changing environmental circumstances by developing into new species.
What the scientists find out, they say, might help to explain why there is so much variation in the natural world.
We are interested in how the spiders evolve to become that diverse, Jonah Walker, of the Sanger Institute told BBC News.
Peacock spiders are found across Australia and each one is the size of a pin head. It is so-named because of the brilliant colours males have on their abdomen, which they show off in a beguiling mating ritual.
They create a drumming sound with their feet and move rhythmically while displaying their dazzlingly patterned features.
Mr. Walker used to be scared of spiders, but he overcame his phobia when he was drawn to the science behind the spiders for his PhD research.
By comparing the genetic data of multiple species, they hope to identify what causes the remarkable diversity among them, focusing on the role of dark DNA, which constitutes three times more of their genetic makeup than in humans.
The research is part of a larger effort to sequence the genomes of all known species, aiming for unprecedented understanding of biological diversity and evolutionary processes.
