HealthHidden nutrition: We don't know what makes up 99 per cent of our food We know next to nothing about the vast majority of compounds in our diet. Now researchers are finding ways to study this "nutritional dark matter" – and what it could mean for our health Features
DefinitionRetroviruses A retrovirus is a type of virus that uses RNA as its genetic material, rather than DNA. Upon infecting a cell, it uses an enzyme called reverse transcriptase to create a DNA copy of its RNA, which it inserts into the genome of its host.