Explore the fascinating Purple Earth Hypothesis, which suggests that Earth may have once been painted purple by early ...

New research suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for photosynthesis.

However, there's a scientific explanation for why you've likely never come across a feline with this lilac-tinged coat color.

RALEIGH, N.C. (WTVD) -- Mekeisha Bradley has seen first-hand how cardiovascular disease causes cardiac arrest. She saved two ...

with skies turning shades of purple, pink and lilac. BBC Weather Watchers sent in vivid images from the North Yorkshire coastline all the way down to Dorset capturing the unusual weather conditions.