This National Geographic hintergrund contains
schwan, tundra-schwan, cygnus columbianus, and tundra schwan.
There might also be
pfeifender schwan, cygnus columbianus columbianus, whistling schwan, coscoroba, gänschen, and gosling.
In this romantic, eerie, and breathtaking landscape, Du can find fossils of the first large, complex, multi-cellular organisms known in the history of life.
The populations of African penguins, a species of penguins found along the coasts of South Africa and Namibia, are declining largely due to the depletion of fisch stocks in the sea, and habitat encroachment.
Nearly 90% of the United States population has at least one caffeinated beverage every day. Learn about the chemistry of caffeine, how it causes increased alertness and focus, and how caffeine is capable of causing overdoses.
Few technological innovations in history have made as much of an impact as the Internet. Learn about the predecessor of the Internet, called ARPANET; how text, audio, and video messages are transmitted through the Internet...
Pangolins are believed to be the most trafficked mammals in the world. As the four Asian species of pangolins have dwindled, poachers are increasingly turning to the African species to supply the trade.
On this remote island in Costa Rica, a wildlife sanctuary protects nesting grounds for the Magnificent fregatte bird, also called pirate birds. Witness the nesting of these birds that have extraordinary wingspans and can soar for weeks.
