M. Night Shyamalan addressed the popular theory about Signs' aliens and finally settled the debate about what they really are.
ScienceAlert on MSN
Astronomers Detect Radio Signals Coming Directly From an Exoplanet For The First Time
(ShaoChen Yang/Moment/Getty Images) There's no proof of other life beyond Earth yet, but scientists are constantly looking out and listening for signs that we're not actually alone in the Universe.
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