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Four people pulling on four corners of a space blanket
08/01/07

Dark energy

Dark energy, the weirdest and most abundant stuff in the universe, is causing the expansion of the universe to speed up.

08/01/07

The particle physics life list

Bird watchers have "life lists" of species they hope to see in their lifetimes. Why shouldn'’t particle physics fans do the same? With that in mind, in our April issue we asked readers to help us put together the first particle physics life list.

08/01/07

Raising MoNA

In the olden days, farmers would travel for miles through the American countryside to help neighbors raise a barn.

Logbook of Jun-July 2007
07/01/07

First users’ meeting

In 1967, 400 enthusiastic scientists met at Argonne National Laboratory to discuss plans to build a new 200 GeV accelerator and a national laboratory to house it.

07/01/07

Secrets of a heavyweight

A dozen years after it first appeared on the world stage, the top quark is still one of the hottest topics in particle physics. Why is it so much heavier than any other particle? And what can it tell us about the origin of mass and other quantum mysteries?

An illustration of a film strip with particle events on each frame
07/01/07

Particle event

Scientists call the particle collisions and interactions they study “particle events.”

07/01/07

Talk and chalk

Theorists can’t help it: When asked to explain something, they reach for a piece of chalk. The language of math and physics seems to require a writing implement and a large vertical surface.

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