This is because its preferred habitats - unfertilised lawns, churchyards and other semi-natural grassland - are under threat, mainly due to fertilisers in agriculture and gardening. Predatory sea ...

Before plants ruled, Earth may have glowed violet ... Evolutionary competition may have forced this purple pigment into the shadows. Microbes in the Great Salt Lake and the Dead Sea still use ...

The study, led by researchers from Cornell University, aims to expand the understanding of potential signs of life beyond Earth's familiar ... relied on a purple-pigment molecule called retinal ...