An artist’s impression of Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star. It is the first planet that NASA’s Kepler mission has confirmed to orbit in a star’s habitable zone - the region around a star where liquid water, a requirement for life on Earth, could persist. NASA/Ames/JPL-Caltech

Curious Kids: why has nobody found any life outside of Earth?

Life could exist in another solar system in a different part our galaxy. Or in another galaxy far away. We don’t have the perfect technology yet to study such far away places but we’re still trying.
The South Pole Telescope and BICEP telescopes (pictured above) may discover clues that could teach us if there was something else ‘before’ the Big Bang. Dr. Keith Vanderlinde/NSF

Curious Kids: What existed before the Big Bang? Did something have to be there to go boom?

Long ago in the distant past, our entire Universe was microscopic – just like an atom – and obeyed completely different rules of cause and effect.

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