"We think about green plants and then blue oceans and then another pale ... what we encounter around us every day. Finding one purple planet abundant with similar biology to the purple bacteria ...

THE Earth’s ocean could one day turn purple – and scientists say it used to be a totally different colour. When observed from ...

The first life forms used retinal instead of chlorophyll, absorbing green light and reflecting red and blue—turning the planet an eerie purple. Chlorophyll wasn’t always king. Retinal ...

That led them to consider that these ancient aquatic organisms actually fed on iron to fuel photosynthesis, and they must ...