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In 1991, the United States Department of Energy spent about $1 million to create a universal symbol to warn future generations about nuclear waste.
This episode highlights SETI's search for extraterrestrial intelligence in our vast universe.
3,700 exoplanets have been identified so far, yet no signals from extraterrestrial civilizations have been detected in nearly 60 years of searching.
For almost 20 years, people in a Norwegian valley have reported strange lights hovering near them, sparking ongoing investigations into their origin.
3,700 known exoplanets have been identified, yet no signals indicating extraterrestrial life have been detected in nearly 60 years of searching.
