Cosmology

But researchers confident that the existence of the Higgs boson will be decided in 2012.

A sub-satellite of the Saturnian moon would explain two of the most puzzling features of Iapetus. John Matson reports

Most physicists are betting against the idea that neutrinos can pierce the cosmic speed limit, but that has not stopped some researchers from exploring the implications

Observatory would reveal structures that trigger sunspots and space weather.

A new study finds that previous estimates for this gaseous planet's swirling rotation were inaccurate

Listen to the announcement of the 2011 Nobel Prize in Physics, to Saul Perlmutter, Brian Schmidt and Adam Riess, from the Royal Swedish Academy of Sciences. Following the formal announcement comes an explanation of the research, which tracked type Ia supernovae to discover that the expansion of the universe was accelerating, and a phone conversation with new Nobel laureate Brian Schmidt

Saul Perlmutter, Brian Schmidt and Adam Reiss share the 2011 Nobel Prize in Physics for their observations that type Ia supernovae indicate that the expansion of the universe is accelerating. Steve Mirsky reports

Dark matter is not just a puzzle. It is a solution

We asked a number of physicists for their reaction to the announcement of neutrinos breaking the cosmic speed limit

In this excerpt from the new book Knocking on Heaven's Door: How Physics and Scientific Thinking Illuminate the Universe and the Modern World (Harper Collins, 2011), you'll learn why, although it's true that scientists sometimes have been wrong, that doesn't mean there are no rules--or that everything is possible

Encounters with the Sagittarius Dwarf Galaxy could have had huge effects on the structure of the Milky Way

New findings spotlight conflicting results from search for elusive theoretical particles.