This yellowing of leaves is sometimes confused with a nutrient deficiency disease called iron chlorosis, especially in the ...

Purple Earth Hypothesis suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for ...

Scientists discovered that the red stigmas in wind-pollinated trees accumulate anthocyanin, the same compounds that are revealed in autumn leaves after green chlorophyll production slows down and ...

You might know how a coffee bean looks, tastes, and smells. But do you know how it's classified? For example, do you know if ...