For much of human history, people needed specialized training to navigate from point A to point B, like learning to follow the stars or use a sextant and chronometer. Today, thanks to global positioning satellites that send signals to our phones, we can all be successful navigators. Kojo talks with two curators about the history and future of navigation and a new exhibit at the Smithsonian's Air and Space Museum called "Time and Navigation: The Untold Story of Getting from Here to There."
Photos From The Smithsonian's 'Time And Navigation' Exhibit
How GPS Works
This animation showcases the various components of the Global Positioning System and how they work together to help determine position.
After several years of declining shrimp stocks, regulators have imposed a moratorium on shrimping in New England waters. The closure could hurt commercial fisherman and future demand for the Gulf of Maine shrimp, but scientists say the move may be the only way to prevent the population from collapsing.
To an African-American coming of age in the late 1970s, there seemed two certainties: Nelson Mandela would die in prison in apartheid South Africa and no black person would become U.S. president in his lifetime. So much for youthful predictions.
The high-tech system can essentially override human error and slow a train that is going too fast. Congress mandated that all trains have it by 2015, but only a few passenger and freight railroads will be ready by then. And after a deadly train crash in New York, few in Congress may be willing to vote for a delay.
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