Like other urchins, the red sea urchin has a dome-shaped shell called the “test” covered in spines. Its test is also covered with tube feet that it uses to move and bring food to its mouth, at the ...

How much does the area of the ocean covered by sea ice change throughout the year and over time? This interactive map shows monthly sea ice concentration anomalies in the Arctic Ocean. A different map ...

West Philippine Sea is the name given by an administrative order (AO) of then President Benigno Aquino III to Philippine territorial waters west of the country. Aquino’s AO said West Philippine Sea ...