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

Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with ...

Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising temperatures are once again causing the world’s oceans to turn green.

Scientists study how tiny pigments in leaves use quantum mechanics to transfer energy efficiently for better solar panels.

One of the key areas of recent research is the study of ochre, a natural earth pigment that has been used in rock art for thousands of years. A review of ochre archaeometry has highlighted the ...

realgar and red earth pigments, highlighting the sophisticated techniques used in adorning the palace. This significant find casts light on the artistic prowess of Nero's time, indicating a high ...