America must open up its borders to end the burden of a complicated immigration system and which the government has no way of successfully tracking, The Washington Post writes.
"Our immigration system is badly broken," writes The Washington Post’s commentators. "Although our borders have become far more secure in recent years, too many people seeking illegal entry get through. We have no way to track whether the millions who enter the United States on valid visas each year leave when they are supposed to. And employers are burdened by a complicated system for verifying workers' immigration status. Last week we met with President Obama to discuss our draft framework for action on immigration. We expressed our belief that America's security and economic well-being depend on enacting sensible immigration policies. The answer is simple: Americans overwhelmingly oppose illegal immigration and support legal immigration. Throughout our history, immigrants have contributed to making this country more vibrant and economically dynamic. Once it is clear that in 20 years our nation will not again confront the specter of another 11 million people coming here illegally, Americans will embrace more welcoming immigration policies."
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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