Chalk is a fine-textured form of limestone. It is composed of several tiny fragments of the calcite shells or skeletons of ...

The ocean has long acted as a stabilizing force in the climate system, quietly drawing carbon dioxide out of the atmosphere ...

Once at risk of being wiped out, humpback whales charted a remarkable comeback thanks to their songs. In 1979, National ...

A hulking shark with a rubbery, lantern-like mouth and a body the length of a delivery van is not what most people expect to ...

Scientists say a bioluminescent bloom lighting up the southeast coastline of Australia’s island state of Tasmania, with red ...

Something unusual happened off the coast of Panama this year, and at first it did not look dramatic. There was no single ...

A breathtaking cliff path with views of the turbulent sea below has been named the UK's cleanest hiking trail. The Gobbins, a ...

President Donald Trump’s talk about America controlling Greenland have put this Arctic territory under the spotlight at a ...

MELBOURNE, Jan. 6 (Xinhua) -- Scientists say a bioluminescent bloom lighting up the southeast coastline of Australia's island state of Tasmania, with red tides by day and blue glows by night, stems ...

The US is filled with underrated gems - these are the best lesser-known spots in America, overlooked due to their remoteness, ...

The cliff path has been named the UK's cleanest walking trail by Independent Cottages, featuring spectacular bridges and ...

6 x 50 in. (15.2 x 127 cm.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...