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Could an Earth-like alien civilization detect us?
February 05, 2025
UNIVERSITY PARK, Pennsylvania, Feb. 5 -- Pennsylvania State University issued the following news:

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Could an Earth-like alien civilization detect us?

UNIVERSITY PARK, Pa. -- If an extraterrestrial civilization existed with Earth-like technology, would they be able to detect Earth and evidence of humanity? If so, what signals would they detect and from how far away? A new study by a team that includes Penn State astronomers and alumni used a theoretical, . . .

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