Santosh Venkatagiri

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British scientists create a 'tractor beam' of ultrasonic sound

A team of researchers from the Universities of Bristol and Sussex have developed the world's first functioning sonic tractor beam able to operate outside of a lab environment. The device uses 64 miniature speakers to generate high-amplitude, ultrasonic sound waves. These waves create an "acoustic …

Nature Communications

5 ways to make money with your phone

You don't like to think about it, but between the up-front cost and the monthly contract payments, your phone costs you a fair bit of money. What you might not realize is that it can make you money, too.<p>You won’t get rich, but you can pay for a few trips to Starbucks. Here’s how to get started.<p><b>1.</b> …

Astronomers solve 20-year-old quasar mystery

New works suggests most observed quasar phenomena depend on two things: how efficiently a central black hole is being fed and the astronomer’s …

Black Holes

Flatten Your Belly with This Killer Ab Workout

Get a tight stomach in just six weeks without doing a single crunch. This may be the easiest workout we've ever printed<p>Get ready to whip off your cover-up: This workout, created exclusively for <i>Women's Health</i> by Rachel Cosgrove, C.S.C.S., owner of Results Fitness in Newhall, California, combines …