THE Earth's ocean could one day turn purple - and scientists say it used to be a totally different colour. The Earth's seas have been predominantly blue for around the last 600 million years.

Satellite data reveals a concerning shift in ocean color, with over half the world's surface changing in the last two decades. Tropical regions are turning greener, while others become bluer ...

B. Cael from the UK’s National Oceanography Centre, published in Nature, found that over half of the world's ocean surface — 56% — has changed colour in the last 20 years. The likely driver?