This week, we explore alien worlds. Find out why the legend of Area 51 still fascinates us, learn what we know from decades of UFO government investigations, and discover the planet that just became a top suspect in the hunt for alien life. Plus, top stories you may have missed.
Secluded in the Nevada desert, the military base has long been associated with alien and UFO sightings. Here’s the real history behind the conspiracy theories.
Astronomer Frank Drake came up with the famous formula as he prepared for a last-minute meeting in 1961. It still guides the search for intelligent life beyond Earth.
The mixture of gasses measured in exoplanet K2-18 b suggests it may have a global ocean beneath a hydrogen-rich atmosphere—and astronomers even spotted a tantalizing, though unconfirmed, sign of life.
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