Hello,

We noticed you're browsing in private or incognito mode.

To continue reading this article, please exit incognito mode or log in.

Not an Insider? Subscribe now for unlimited access to online articles.

Why we made this change

Visitors are allowed 3 free articles per month (without a subscription), and private browsing prevents us from counting how many stories you've read. We hope you understand, and consider subscribing for unlimited online access.

Back to MIT Technology Review home
Contact customer service if you are seeing this message in error.
Emerging Technology from the arXiv

A View from Emerging Technology from the arXiv

Call 'n' Cry

The beat of the rest from the Physics arXiv this week

  • May 30, 2012

How Do You Know If You Ran Through A Wall?

Seasonal Melting And The Formation Of Sedimentary Rocks On Mars, With Predictions For The Gale Crater Mound

PageRank Of Integers

Shaken Granular Lasers

Google+ Or Google-?: Examining The Popularity Of The New OSN

Be the leader your company needs. Implement ethical AI.
Join us at EmTech Digital 2019.

Register now

Related Video

More videos


MIT Media Kit Video 00:47


daudelinmovie3.mp4 00:33


estradamovie3.mp4 03:32


Solving Cold Cases: An Unlikely Application for DNA Databases 27:01
Want more award-winning journalism? Subscribe and become an Insider.
  • Insider Plus {! insider.prices.plus !}* Best Value

    {! insider.display.menuOptionsLabel !}

    Everything included in Insider Basic, plus the digital magazine, extensive archive, ad-free web experience, and discounts to partner offerings and MIT Technology Review events.

    {! insider.buttons.plus.buttonText !}
    See details+

    Print + Digital Magazine (6 bi-monthly issues)

    Unlimited online access including all articles, multimedia, and more

    The Download newsletter with top tech stories delivered daily to your inbox

    Technology Review PDF magazine archive, including articles, images, and covers dating back to 1899

    10% Discount to MIT Technology Review events and MIT Press

    Ad-free website experience

  • Insider Basic {! insider.prices.basic !}*

    {! insider.display.menuOptionsLabel !}

    Six issues of our award winning print magazine, unlimited online access plus The Download with the top tech stories delivered daily to your inbox.

    {! insider.buttons.basic.buttonText !}
    See details+

    Print Magazine (6 bi-monthly issues)

    Unlimited online access including all articles, multimedia, and more

    The Download newsletter with top tech stories delivered daily to your inbox

  • Insider Online Only {! insider.prices.online !}*

    {! insider.display.menuOptionsLabel !}

    Unlimited online access including articles and video, plus The Download with the top tech stories delivered daily to your inbox.

    {! insider.buttons.online.buttonText !}
    See details+

    Unlimited online access including all articles, multimedia, and more

    The Download newsletter with top tech stories delivered daily to your inbox

* {! insider.display.footerLabel !}

See international prices

See U.S. prices

Revert to MIT Enterprise Forum pricing

Revert to standard pricing

/3
You've read of three free articles this month. for unlimited online access. You've read of three free articles this month. for unlimited online access. This is your last free article this month. for unlimited online access. You've read all your free articles this month. for unlimited online access. You've read of three free articles this month. for more, or for unlimited online access. for two more free articles, or for unlimited online access.