A new survey finds that 80 million Americans, or 36 percent of the population, believe UFOs are real. One in 10 respondents say they have personally witnessed an alien spaceship. And if aliens were to invade the country sometime in the next four years, 65 percent of survey respondents said President Obama would be better suited for handling the invasion than Republican presidential candidate Mitt Romney.
via One-third of Americans Believe in UFOs, Survey Says | UFO Belief | LiveScience.
Tractor beams — which allow spaceships to pick up and shift objects without physically touching them — have long been a staple of science fiction.
Previous attempts to build them have relied on inducing electric or magnetic charges, using heat to create air pressure differences, and even attempting to manipulate gravity. However, a physicist has proposed and intriguing new possibility — one that uses nothing but light.
Keep Reading: Could Tractor Beams Be Made From Light? | Wired Science | Wired.com.