Pollia condensata, native to Africa, uses nanoscale-sized structures to produce the most intense color ever studied in biological tissue. Image via PNAS The tiny, rock-hard fruits of Pollia condensata ...

Researchers have shown why intense, pure red colors in nature are mainly produced by pigments, instead of the structural color that produces bright blue and green hues. The researchers, from the ...

Previous columns on Dr. Michael Greger’s “Daily Dozen” have noted that plant foods with intense color are loaded with ...