The Telegraph reports that the nutritional value of fruit and vegetables has fallen by up to 50% since the Sixties, according a new study from researchers at startup studio Deep Science Ventures. The study “found that humans needed to consume twice the number of vegetables to get the same level of minerals such as potassium, magnesium or copper as would have been present in their food 60 years ago.” The study found that many crops had lost 20% to 50% of several key nutrients… The decrease in nutrient and vitamin value is thought to be down to declining soil quality and crops being selectivel