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Communications of the ACM

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An edited collection of advanced computing news from Communications of the ACM, ACM TechNews, other ACM resources, and news sites around the Web.


How To Change Your Past
From ACM News

How To Change Your Past

"Too late" might be the two most tragic words in English, but what if you could rewind the clock?

2 Futures Can Explain Time's Mysterious Past
From ACM News

2 Futures Can Explain Time's Mysterious Past

Physicists have a problem with time.

Intel ­pgrades Stephen Hawking's Portal to the World
From ACM News

Intel ­pgrades Stephen Hawking's Portal to the World

Movie audiences who went to theaters this fall to see The Theory of Everything got a glimpse of the challenges physicist Stephen Hawking has overcome to deliver...

What Is It Like to Control a Robotic Arm with a Brain Implant?
From ACM Opinion

What Is It Like to Control a Robotic Arm with a Brain Implant?

Jan Scheuermann is not your average experimental subject.

'glass Brain' Offers Tours of the Space Between Your Ears
From ACM Opinion

'glass Brain' Offers Tours of the Space Between Your Ears

Former Grateful Dead percussionist Mickey Hart takes pride in his brain.

A Computer Scientist Tells Mathematicians How To Write Proofs
From ACM Opinion

A Computer Scientist Tells Mathematicians How To Write Proofs

Believe it or not, I do have friends who would describe themselves as not liking math, and every so often one of them will share this meme on Facebook: And then...

Visualizing 4-Dimensional Asteroids
From ACM Opinion

Visualizing 4-Dimensional Asteroids

One of the largest treasure troves of astronomical data comes from the Sloan Digital Sky Survey (SDSS), an ongoing scan of the firmament that began 15 years ago...

Nasa to Send Sample-Return Mission to Earth-Bound Asteroid
From ACM News

Nasa to Send Sample-Return Mission to Earth-Bound Asteroid

NASA has long wanted to send a mission to Mars to grab some of its surface and sling it back to Earth.

Map of Body's Protein-Folding Machinery Wins a Major Medical Prize
From ACM News

Map of Body's Protein-Folding Machinery Wins a Major Medical Prize

It's speculation season once again for Nobel Prize watchers.

Time Travel Simulation Resolves 'grandfather Paradox'
From ACM News

Time Travel Simulation Resolves 'grandfather Paradox'

On June 28, 2009, the world-famous physicist Stephen Hawking threw a party at the University of Cambridge, complete with balloons, hors d'oeuvres and iced champagne...

'ambiguous' Warfare Buys Upgrade Time For Russia's Military
From ACM News

'ambiguous' Warfare Buys Upgrade Time For Russia's Military

Unmarked Russian soldiers who seized Ukraine's Crimea region earlier this year gave every appearance of military professionals well equipped with modern body armor...

Transistor Successor Set to Bring on 'the Machine' Age Soon
From ACM TechNews

Transistor Successor Set to Bring on 'the Machine' Age Soon

Researchers are working to develop memristors, a response to the diminishing return of the transistor technology used in today's computer chips. 

Transistor Successor Set to Bring on "the Machine" Age Soon
From ACM News

Transistor Successor Set to Bring on "the Machine" Age Soon

A replacement for the ordinary transistor may make it to market by the end of this decade, an event that will herald a radical redesign of traditional computer...

In Defense of Science
From ACM News

In Defense of Science

Steady, sufficient investments in basic research are necessary to ensure the continued success of the U.S. in the future, four expert witnesses testified to Congress...

Squiggly Lines Secure Smartphones
From ACM News

Squiggly Lines Secure Smartphones

To protect your financial and personal data, most mobiles come with PIN-based security, biometrics or number grids that require you to retrace a particular pattern...

Time Travel: Installing an Atomic Clock at 15,000 Feet
From ACM Opinion

Time Travel: Installing an Atomic Clock at 15,000 Feet

A few months ago I went to Cambridge, Mass. to check in with the Event Horizon Telescope crew and found Shep Doeleman, the project leader, fresh off the completion...

A Stellar Discovery on the Milky Way's Far Side
From ACM News

A Stellar Discovery on the Milky Way's Far Side

A single Hubble Space Telescope image can capture scores of distant galaxies, but the one galaxy we'll never see from the outside is our own.

Electric Grid, You Have Software ­pdates Available
From ACM News

Electric Grid, You Have Software ­pdates Available

The electric grid was designed as a one-way highway, with power cascading out from big power plants to cities and towns at the end of the line.

Watch the Earth From Space, Live!
From ACM News

Watch the Earth From Space, Live!

It doesn't get much better than this (well, of course being in space might be better, albeit colder).

Bitcoin Vies with New Cryptocurrencies as Coin of the Cyber Realm
From ACM News

Bitcoin Vies with New Cryptocurrencies as Coin of the Cyber Realm

At a bitcoin conference in Miami this January, Jeffrey Tucker, a laissez-faire economist and libertarian icon, made an unexpected observation.
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