A hypothetical "inflaton" particle fueled the universe's initial expansion out of a single atom - all in the fraction of a nanosecond. And we might soon find the particle responsible. Get the scoop via New Scientist.
The cosmic microwave background radiation has provided scientists with some of the best data on the earliest days of the universe. Cosmologists may have worked out how to learn even more, involving a painstaking search for the universe's oldest helium.