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The first tests of optical communications far from Earth will take place aboard the asteroid-bound Psyche spacecraft

Scientists were able to map out the hidden Antarctic landscape that had ancient rivers by tracing radio waves in a new study. Read more here.

Astronomers have detected a mysterious blast of radio waves that have taken 8 billion years to reach Earth. The fast radio burst is one of the most distant and energetic ever observed.

For 8 billion years, a radio burst packing more energy than what the sun produces in 30 years made its way across the cosmos before reaching Earth.

Astronomers have been looking for radio waves sent by a distant civilization for more than 60 years. Rytis Bernotas/iStock via Getty ImagesIf an alien were to look at Earth, many human technologies – from cell towers to fluorescent light bulbs – could be a beacon signifying the presence of life. We are two astronomers who work on the search for extraterrestrial intelligence – or SETI. In our research, we try to characterize and detect signs of technology originating from beyond Earth. These are