Pattern on Earth: extremely dense and vast populations in a network of megacities connected to each other with nerves of roads and wires, woven over an empty landscape of wild land.
By 2050 and beyond, Earth will be a urban planet, while the average place on the planet will be nearly wild.
The earth is about 9,000 years old, according to U.S. House Representative Paul Broun, who is also a physician and member of the Committee on Science, Space and Technology of the House of Representatives.
The plausibility of a planetary-scale ‘tipping point’ highlights the need to improve biological forecasting by detecting early warning signs of critical transitions on global as well as local scales, and by detecting feedbacks that promote such transitions.
National Geographic‘s elegant infographic displays 50 years of space exploration in a colorful map of our planetary neighbours.
The “Fifty Years of Exploration” map, created by Sean McNaughton and Samuel Velasco for National Geographic, outlines humanity’s journeys into space.
Put all the water on this planet into a single sphere and it would have a diameter of about 860 miles, says the United States Geological Survey. For reference, that's roughly the distance between Salt Lake City, Utah, and Topeka, Kansas.
Google Earth permet de comparer des images de différentes dates. Voici un exemple dans un domaine réservé aux photo-interprètes militaires : une action militaire lancée en mars 2011 quand la situation en Libye était critique, l’attaque de la base aérienne d’Al Jufra par l’aviation française.