Scientists Created a Water Tractor Beam

Tractor beams have long been a science fiction fantasy—a magical force that attracts objects from a distance, like an alien’s spaceship sucking up its earthling specimens. We’re not quite that advanced, but physicists at The Australian National University have created a “tractor beam on water” that makes floating objects move wherever they are directed.

The group, led by Professor Michael Shats, started with a ping pong ball. Placing it in a small pool, they created waves using a thin, cylindrical device with suction cups on the bottom. When the device vibrates up and down, these cups come in contact with the water, creating waves. Different wave frequencies and sizes, along with different cup shapes, create different kinds of currents. Some pulled the ball inward, some pushed it outward.

Dr. Horst Punzmann, from the Research School of Physics and Engineering, said the team even found a way of “creating waves that can force a floating object to move against the direction of the wave.”

This doesn’t sound like rocket science. It seems quite obvious that waves make floating objects move, right? But actually, what propels floating objects aren’t the waves themselves, it’s the currents they create. Never before have we identified the precise wave patterns that make an object go one way or another, or how to replicate them. “It’s one of the great unresolved problems, yet anyone in the bathtub can reproduce it,” Punzmann said. Interestingly, there’s still no mathematical theory to explain why these experiments work. That said, this new knowledge could help us clean up oil spills and ocean trash, or retrieve drifting boats.

"The applications could be numerous," Shats said. A paper documenting the findings is featured in the journal Nature Physics.

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The Most Popular Netflix Show in Every Country
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most popular Netflix show in each country map
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most popular Netflix show in each country map key
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If you're bored with everything in your Netflix queue, why not look to the top shows around the world for a recommendation?

HighSpeedInternet.com recently used Google Trends data to create a map of the most popular show streaming on Netflix in every country in 2018. The best-loved show in the world is the dystopian thriller 3%, claiming the number one spot in eight nations. The show is the first Netflix original made in Portuguese, so it's no surprise that Portugal and Brazil are among the eight countries that helped put it at the top of the list.

Coming in second place is South Korea's My Love from the Star, which seven countries deemed their favorite show. The romantic drama revolves around an alien who lands on Earth and falls in love with a mortal. The English-language show with the most clout is 13 Reasons Why, coming in at number three around the world—which might be proof that getting addicted to soapy teen dramas is a universal experience.

Pot comedy Disjointed is Canada's favorite show, which probably isn't all that surprising given the nation's recent ruling to legalize marijuana. Perhaps coming as even less of a shock is the phenomenon of Stranger Things taking the top spot in the U.S. Favorites like Black Mirror, Sherlock, and The Walking Dead also secured the love of at least one country.

Out of the hundreds of shows on the streaming platform, only 47 are a favorite in at least one country in 2018. So no hard feelings, Gypsy.

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Roadside Bear Statue in Wales is So Lifelike That Safety Officials Want It Removed
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Wooden bear statue.

There are no real bears in the British Isles for residents to worry about, but a statue of one in the small Welsh town of Llanwrtyd Wells has become a cause of concern. As The Telegraph reports, the statue is so convincing that it's scaring drivers, causing at least one motorist to crash her car. Now road safety officials are demanding it be removed.

The 10-foot wooden statue has been a fixture on the roadside for at least 15 years. It made headlines in May of 2018 when a woman driving her car saw the landmark and took it to be the real thing. She was so startled that she veered off the road and into a street sign.

After the incident, she complained about the bear to highways officials who agreed that it poses a safety threat and should be removed. But the small town isn't giving in to the Welsh government's demands so quickly.

The bear statue was originally erected on the site of a now-defunct wool mill. Even though the mill has since closed, locals still see the statue as an important landmark. Llanwrtyd Wells councilor Peter James called it an "iconic gateway of the town," according to The Telegraph.

Another town resident, who wished to remain anonymous, told The Telegraph that the woman who crashed her car had been a tourist from Canada where bears are common. Bear were hunted to extinction in Britain about 1000 years ago, so local drivers have no reason to look out for the real animals on the side of the road.

The statue remains in its old spot, but Welsh government officials plan to remove it themselves if the town doesn't cooperate. For now, temporary traffic lights have been set up around the site of the accident to prevent any similar incidents.

[h/t The Telegraph]

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