Education in North Korea
Victor Cha is the former Director for Asian Affairs at the National Security Council, where he served as an advisor to the President from 2004-2007. The recipient of two Outstanding Service Commendations during his tenure at the White House, Cha is also the award-winning author of Alignment Despite Antagonismand Beyond the Final Score: The Politics of Sport in Asia. His writing has appeared in Foreign Affairs,International Security, and Political Science Quarterly, among other journals. As an expert on North Korea, he has been interviewed on many national news outlets, including ABC, CBS, NBC, CNN, Fox, PBS News,and he has written on the topic for the New York Times, the Washington Post, the Financial Times, the LosAngeles Times, and for USA Today. Cha currently holds the D.S. Song Chair in Government in the School of Foreign Service at Georgetown University and is a senior adviser at the Center for Strategic and International Studies in Washington, D.C.
Photo Credit: Kaveh Sardari
Here's the science of black holes, from supermassive monsters to ones the size of ping-pong balls.
- There's more than one way to make a black hole, says NASA's Michelle Thaller. They're not always formed from dead stars. For example, there are teeny tiny black holes all around us, the result of high-energy cosmic rays slamming into our atmosphere with enough force to cram matter together so densely that no light can escape.
- CERN is trying to create artificial black holes right now, but don't worry, it's not dangerous. Scientists there are attempting to smash two particles together with such intensity that it creates a black hole that would live for just a millionth of a second.
- Thaller uses a brilliant analogy involving a rubber sheet, a marble, and an elephant to explain why different black holes have varying densities. Watch and learn!
- Bonus fact: If the Earth became a black hole, it would be crushed to the size of a ping-pong ball.
Military recruits are supposed to be assessed to see whether they're fit for service. What happens when they're not?
- During the Vietnam War, Robert McNamara began a program called Project 100,000.
- The program brought over 300,000 men to Vietnam who failed to meet minimum criteria for military service, both physically and mentally.
- Project 100,000 recruits were killed in disproportionate numbers and fared worse after their military service than their civilian peers, making the program one of the biggest—and possibly cruelest—mistakes of the Vietnam War.
In a breakthrough for nuclear fusion research, scientists at China's Experimental Advanced Superconducting Tokamak (EAST) reactor have produced temperatures necessary for nuclear fusion on Earth.
- The EAST reactor was able to heat hydrogen to temperatures exceeding 100 million degrees Celsius.
- Nuclear fusion could someday provide the planet with a virtually limitless supply of clean energy.
- Still, scientists have many other obstacles to pass before fusion technology becomes a viable energy source.
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