Technique could redefine the kilogram

Astronomers spy 4-billion-light-year-wide clump of quasars

An audio roundup of some of our favorite stories of the week

Distorted system still spawning offspring

A small search for "supermoons" comes up dry

Contrary to expectations, cosmic voids enhance the brightness of galaxies behind them

Government plan to reinvigorate economy will float some research boats

Our galaxy is only half as massive as astronomers thought

Linebacker Junior Seau, who committed suicide, latest athlete to be linked to disorder

New study suggests that the birds can indeed read each others thoughts

High metabolism surprisingly extends lifespan in one species