The scientists found fossils of a green algae that cover the sea floor, thought to be the ancestors of terrestrial plants that first appeared.
A cluster of algae that covers up to 200 square kilometers is heading toward China's east coast, threatening the region's ecology and tourism.
Local authorities and residents of Qingdao City, Shandong Province (China) said they are taking every measure to eliminate the blooming green algae that rage on the east coast.
The beaches in Shandong Province, China in the Yellow Sea are turning green due to the rapid growth of seaweed.
The size of giant blue algae on China's east coast increased by more than 50% and it is heading towards Jiangsu province.
China's environmental pollution is causing many rivers to change to red, black or blue-brown, seriously affecting people's lives.
Water in many lakes in the United States turns green because of algae outbreaks, while China's east coast also suffers a similar situation.
US authorities are forced to warn people after discovering some lakes and rivers with green algae that contain dangerous toxins.
Scientists have discovered a new compound in algae that has potential anti-cancer properties.