Director Steven Spielberg explores the otherworldly in 'Disclosure Day,' in theaters June 12 ...

The combustible sedimentary rock, better known as coal, was not only crucial to the onset of advanced technology here on Earth, but it should also be key to the development of advanced E.T.s residing ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

With this new survey, astronomers have gained a peek inside a stage of exoplanet system formation they have yet to fully ...

When people imagine aliens, they usually picture biological creatures similar to life on Earth. But many scientists argue ...