NASA Commentator Dan Huot talks with David Hornyak, the project manager of the High Definition Earth Viewing experiment, about the first year of the project’s operation and screens some of its memorable scenes. From a perch on the nadir side of the International Space Station’s Columbus module, HDEV’s four high definition off-the-shelf video cameras have been transmitting clear, sharp views of Earth from an altitude of 250 miles, providing impressive views while testing how the hardware holds up in the harsh environment of Earth orbit.
"Ever curious about the reaches of the United Nation and what they do? Here's a great video featuring Dr. Binoy Kampmark from RMIT University. This short video can help improve your understanding of the UN, including its role in world politics and policy making."
A map projection is used to portray all or part of the round Earth on a flat surface. This cannot be done without some distortion. Every projection has its own set of advantages and disadvantages. There is no "best" projection. The mapmaker must select the one best suited to the needs, reducing distortion of the most important features. Mapmakers and mathematicians have devised almost limitless ways to project the image of the globe onto paper. Scientists at the U. S. Geological Survey have designed projections for their specific needs—such as the Space Oblique Mercator, which allows mapping from satellites with little or no distortion. This document gives the key properties, characteristics, and preferred uses of many historically important projections and of those frequently used by mapmakers today.
We learned last year that many of the effects of climate change are irreversible. Sea levels have been rising at a greater rate year after year, and the Intergovernmental Panel on Climate Change estimates they could rise by another meter or more by the end of this century.
The world's population is projected to reach 11 billion by the end of the century. Feeding that many people will be a challenge, and it is further complicated by the impact of climate change on agriculture. That is why some people advocate an unusual way to boost the food supply and feed people sustainably: by eating less meat, and more insects.
"The city of Paris will start removing padlocks from the Pont des Arts on Monday, effectively ending the tourist tradition of attaching 'love locks' to the bridge. For years, visitors have been attaching locks with sentimental messages to the bridge in symbolic acts of affection. Some further seal the deal by throwing keys into the Seine River below. It was considered charming at first, but the thrill wore off as sections of fencing on the Pont des Arts crumbled under the locks' weight. The bridge carries more than 700,000 locks with an estimated combined weight roughly the same as 20 elephants."
"It's difficult to comprehend the ridiculous amounts of water that have fallen in such a short time in a state that, until recently, had been in the grip of a historic drought. But one place to start would be to look at reservoir levels in the state. In the past 30 days, Texas reservoirs have gone from being 73 percent full to 82 percent full, according to data maintained by the Texas Water Development board. All told, about 8 million acre-feet of water have flowed into the state's reservoirs."
Beginning in the 1950s, cities demolished thousands of homes in walkable neighborhoods to make room for freeways.
At the time, this was seen as a sign of progress. Not only did planners hope to help people get downtown more quickly, they saw many of the neighborhoods being torn down as blighted and in need of urban renewal. But tearing down a struggling neighborhood rarely made problems like crime and overcrowding go away. To the contrary, displaced people would move to other neighborhoods, often exacerbating overcrowding problems. Crime rates rose, not fell, in the years after these projects. By cutting urban neighborhoods in half, planners undermined the blocks on either side of the freeway. The freeways made nearby neighborhoods less walkable. Reduced foot traffic made them less attractive places for stores and restaurants. And that, in turn, made them even less walkable. Those with the means to do so moved to the suburbs, accelerating the neighborhoods' decline.
The conflict over Western Sahara dates back to 1975, when, following the death of long-time ruler Francisco Franco, Spain ended its colonial rule of the territory. Spain ceded control of the territory to a joint administration by Morocco and Mauritania, but the Polisario Front - the liberation movement of the indigenous Saharawi people - refused to accept the arrangement, and launched attacks on garrisons manned by soldiers from both countries. Morocco insists that the Western Sahara is part of its historical patrimony, and is unwilling to go beyond offering the Saharawi a limited local autonomy in what Morocco describes as the kingdom's "southern provinces."
Dongguan, China, is a factory town with an estimated population of 10 million, many of whom are migrant workers from other parts of the country. But even a community that large, it seems, is unable to support a 5 million-sq.-ft. shopping center. More than twice the size of the U.S.
These days, ambitious new skyscrapers are blanketed in a cloud of "green" buzzwords. Wind turbines! Hydrogen fuel cells! Insect farms! (Yes, insect farms.) Then there's Phoenix Towers, which has all of the above and more and looks like this. Let's call it what it is: a greenwashed dick-measuring contest.
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