Carnivorous plant discards 'junk' DNA

Genes make up about 2 percent of the human genome. The rest consists of a genetic material known as noncoding DNA, and scientists have spent years puzzling over why this material exists in such voluminous quantities.

'Junk DNA' makes us different from chimps

It was a bit of a surprise for scientists to discover just how similar human and chimpanzee DNA is - and left them scratching their heads to explain the enormous physiological differences between the two species.