Royalty Free Icons & Clipart Stock Images Urban, Urbanization -- National Geographic Cities have existed for thousands of years and can be traced back to the river valley civilizations of Mesopotamia (present-day Iraq), Egypt, India, and China. At first, these settlements depended largely on agriculture and domestic cattle, but as they grew in size they became centers for merchants and traders. Urban growth, also known as urbanization, accelerated dramatically with the advent of industrialization some 200 years ago. At that time, large numbers of people moved to cities in search of jobs, mostly in factories. Urban is defined as "that which is characteristic of a city." Cities make a lot of sense for humans. Cities have always been at the center of economic growth and technological advances. Urban expansion is also encroaching on wildlife habitats everywhere.
World News BioFlix Interactive tutoring on the toughest topics in biology Have you ever wished for an effective tool to help your students visualize tough topics like a tour of the plant and animal cell, cellular respiration, photosynthesis, mitosis, meiosis, protein synthesis, or how neurons work? Our new 3-minute animations allow instructors to show 3D, fluid movement and dramatic "zoom" sequences that bring difficult-to-teach biological concepts to life during lectures. Each animation is accompanied by a PowerPoint® slideshow with screenshots identifying the main components of the animation. Watch our newest video, BioFlix™: The Inside Story featuring a short interview with author, Eric Simon. For a 20-second clip of the available BioFlix animations, click below. Back to Top Here's what students are saying about BioFlix: "I absolutely love the animation and graphics!" "Unreal...that was so helpful.
Why are we a nation of tree-huggers? 3 February 2011Last updated at 15:44 By Jon Kelly BBC News Magazine Plans to transfer ownership of many public forests in England have provoked a huge row. But why are we so protective of our woodlands? It's about the rustling of the leaves and the crunch of twigs underfoot. Above all, it's a place where nature takes priority over humans. For the vast majority of us, living in towns and cities, visiting a forest is the easiest way to escape our mechanised, wipe-clean, ring-roaded civilisation and properly get back to nature. As the government is finding out, a forest unleashes something deeply primordial in otherwise domesticated, suburban Britons. Plans to radically change the ownership of some of England's forests have provoked a furious backlash. A YouGov poll suggested that 84% of people were opposed. to the government's plans, with one pressure group saying it had collected 400,000 signatures on a petition. Continue reading the main story Why trees are a force for good
Hedgerow Recipes Hedgerow Jam 8oz rose hips ~ 1lb blackberries 8oz haws ~ 1lb elderberries 8oz sloes ~ 4oz hazelnuts 8oz rowanberries 1lb crab apples Sugar Wash fruit well. Put rose hips, haws, rowanberries, sloes & chopped crab apples into pan, add water to cover, cook until tender. Rose Hip Syrup Crush 2lbs rosehips and put into 3 pints boiling water. Watercress Sauce 4oz watercress ~ ½ pint water or stock 1oz butter ~ salt and pepper 1tbsp cream Strip leaves from cress and chop stalks.
Red-shouldered-hawk-pale-male-in-snow International Herald Tribune From the Editor By SERGE SCHMEMANN “Turning Points” is the theme of this year-end magazine as we gaze with equal measures of anticipation and alarm into 2014. opinionSpecial Report The Past in Our Future By ROGER COHEN The ghosts of repetition reside alongside the prophets of progress. Global Agenda In 2014 we’ll mostly be talking like pirates and growing mustaches. Our Compass Who are the moral leaders for these times? Cyber Subterfuge By MISHA GLENNY The Internet has lost its innocence: The virtual world is awash with espionage, malware and deception. Digital Passivity By JARON LANIER We have backed ourselves into a virtual corner. The World of Mars By JOHN GROTZINGER There are un-Earthly parallels between the exploration of the Grand Canyon 140 years ago and what is happening on Mars today. Power in 2030: The Roads We May Take By DANIEL YERGIN How we manage the balance between conventional energy sources – oil, natural gas and coal – and renewables will shape our future. Art and Technology Deep Cover
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