Are we getting closer to building an invisibility cloak? According to new research out of Duke University, science may have built an early ancestor to the science fiction device.
Watch the video below of a demonstration of what's being called an "acoustic cloak." The Huffington Post has more:
Made of sheets of perforated plastic, the pyramid-shaped cloak changes the shape and speed of sound waves as they hit it. Those changes make the sound waves appear to reflect off the surface the pyramid is standing on, as though it wasn't there.
To build the cloak, Lucian Zigoneanu, Bogdan-Ioan Popa and Steven Cummer modeled the way sound waves act on a computer. They tried several simulated shapes, and eventually came up with the pyramid design, made with sheets that have holes in them.
Image credit: Dave Young/Flickr
The way that you think about stress can actually transform the effect that it has on you – and others.
- Stress is contagious, and the higher up in an organization you are the more your stress will be noticed and felt by others.
- Kelly McGonigal teaches "Reset your mindset to reduce stress" for Big Think Edge.
- Subscribe to Big Think Edge before we launch on March 30 to get 20% off monthly and annual memberships.
Does believing in true love make people act like jerks?
- Ghosting, or the practice of cutting off all contact suddenly with a romantic partner, is a controversial method of dumping someone.
- People generally agree that it's bad form, but new research shows that people have surprisingly different opinions on the practice.
- Overall, people who are more destiny-oriented (more likely to believe that they have a soulmate) tend to approve of ghosting more, while people who are more growth-oriented (more likely to believe relationships are made rather than born) are less tolerant of ghosting.
"I was so moved when I saw the cells stir," said 90-year-old study co-author Akira Iritani. "I'd been hoping for this for 20 years."
- The team managed to stimulate nucleus-like structures to perform some biological processes, but not cell division.
- Unless better technology and DNA samples emerge in the future, it's unlikely that scientists will be able to clone a woolly mammoth.
- Still, studying the DNA of woolly mammoths provides valuable insights into the genetic adaptations that allowed them to survive in unique environments.
Three scientists publish a paper proving that Mercury, not Venus, is the closest planet to Earth.
- Earth is the third planet from the Sun, so our closest neighbor must be planet two or four, right?
- Wrong! Neither Venus nor Mars is the right answer.
- Three scientists ran the numbers. In this YouTube video, one of them explains why our nearest neighbor is... Mercury!
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