Terra incognita refer to the hypothesized continent Terra Australis Incognita ("The unknown land of the South"), as seen in the Theatrum Orbis Terrarum map by Abraham Ortelius (1570). During the 19th century "terra incognita" disappeared from maps of the earth, since both the coastlines and the inner parts of the continents had been fully explored. But the bottoms of the seas remain mostly un-mapped, as do many other land surfaces in the solar system. The phrase is now also used metaphorically by various researchers to describe any unexplored subject or field of research. For more history of the terms, see Terra Australis,
Sustain Our Planet Sustain Our Planet Sustain Our Planet is a consulting firm that provides carbon calculation and carbon offset consulting to individuals, schools and businesses, focusing on education and greenhouse gas emissions reduction. Sustain Our Planet was formed in 2007 to provide carbon calculation and offset consulting. The company’s carbon calculator allows individuals and businesses to identify their carbon footprint, track it over time and offset it to become carbon neutral. In 2008, Sustain Our Planet expanded its product portfolio and formed its green consulting division to provide environmental services to businesses, energy providers, schools, and cities. The consulting division specializes in