Marine life same environmental problems and feeding niches have resulted in similar adaptations. Examples include albatross, penguins, gannets, and auks. In general, marine birds live longer, breed later and have fewer young than terrestrial birds do, but they invest a great deal of time in their young. Most species nest in colonies, which can vary in size from a few dozen birds to millions. Many species are famous for undertaking long annual migrations, crossing the equator or circumnavigating the Earth in some cases. They feed both at the ocean's surface and below it, and even feed on each other. Marine birds can
Southern Hemisphere Auroral Radar Experiment Southern Hemisphere Auroral Radar Experiment The Southern Hemisphere Auroral Radar Experiment (SHARE), started 1988, is an Antarctic research project designed to observe velocities and irregularities of electrical fields in the ionosphere and magnetosphere. SHARE is operated jointly by the University of Natal, Potchefstroom University, the British Antarctic Survey and Johns Hopkins University and operates out of British Halley Station, South African SANAE IV Station and Japanese Showa Station. Using a total of 16 antennas, each mounted on a 12 m tower and radiating on fixed frequencies in the 8–20 MHz range, SHARE transmits an RF pulse into the upper atmosphere