This herb is packed with antioxidants -- vitamins A, C, and K -- as well as iron, potassium and calcium and can help improve digestion.

CNN: 10 nutrition powerhouses for kids

These little beans are nutrition powerhouses, packing protein, fiber, iron, manganese, folate, thiamin, potassium and other nutrients into a modest calorie count, with just a speck of fat and no cholesterol.

NPR: Falling in Love with Limas

Jake Matijevic was found to be high in elements consistent with the mineral feldspar, such as sodium and potassium, and low in elements such as magnesium and iron.

BBC: Nasa's Curiosity rover finds 'unusual rock'