Andrew Vargas

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A Tractor Beam Made Of Sound Waves

The device can move around centimeter-sized objects.<p>Tractor beams (short for "attractor beams," which can bring one object closer to another from a distance) are a common trope in science fiction. But could they be made in real life? Researchers made news earlier this year when they created a kind …

Scientists find switch for people to control their dreams

Have you ever had a dream where you realized you were dreaming? The technical term is a lucid dream. And people who are lucky enough to have them can often control the dreams, as well. This week, researchers showed for the first time that they could use electrical stimulation to switch lucid …

Rocket Wars: Will A Suit By SpaceX Get Off The Ground?

The two rockets pictured above may look the same, and in many ways they are: Both are launched pointy-end up, and both can carry a satellite into orbit.<p>But the rocket on the left, known as an Atlas V, costs between $100 million and $300 million more to launch (depending on whom you ask) than the …

Hands-On With Coin, The Electronic Credit Card That Hopes To Declutter Your Wallet

There are a number of startups seeking to make our financial lives better, whether it be Simple helping users set budgets and goals or BillGuard to make them aware of fraudulent charges that show up on their credit cards. Then there’s Coin, which wants to create a sort of “one card to rule them …