Register for an account


Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.


Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

The Sciences

Say Hello to the First Antimolecule

Hope you enjoyed it, 'cause it wasn't around long.

By Boonsri DickinsonDecember 5, 2007 6:00 AM


Sign up for our email newsletter for the latest science news

In science fiction, spaceships are often powered by energy released when antimatter annihilates its matter counterpart. In the real world, physicists struggle to create even fleeting particles of antimatter. Twelve years ago they created the first antiatom, and now David Cassidy at the University of California at Riverside has joined two positronium atoms—formed by the union of an electron and its antiparticle, the positron—into the first antimolecule. The short-lived molecule may not have any direct uses, but the technique brings us closer to creating a powerful gamma-ray laser.

    3 Free Articles Left

    Want it all? Get unlimited access when you subscribe.


    Already a subscriber? Register or Log In

    Want unlimited access?

    Subscribe today and save 50%


    Already a subscriber? Register or Log In