To answer the tantalizing question, scientists in search of extraterrestrial intelligence ( SETI) have been scouring exoplanets for “ biosignatures,” specific chemicals or combinations of chemicals alluding to the possibility of past or present life.
In the summer of 1950, while Italian-American physicist Enrico Fermi was discussing the possibility of alien life with fellow physicists over lunch, he ultimately posed a question that we now associate with his eponymous Fermi paradox: “Where is everybody?”
However, skeptics believe that genuine, two-way communication between us and aliens is nearly impossible: humanity may be long gone before it’s even feasible. NASA has awarded funding to “technosignature” hunters that will create a detailed technosignature library. Searching for evidence of technological civilizations in space may be more straightforward than searching for life. Vector Clipart by jannoon028 2 / 78 green planet Vector Clipart by mike301 55 / 4,429 Glossy Earth Map Globe Vector by PixelEmbargo 13 / 998 Green earth Clip Art Vector by 9comeback 4 / 64 various kids around the earth Vector by huhulin 3 / 1,454 Green Earth EPS Vector by Merlinul 7 / 208 Green Earth With Leaves Vector Illustration by adamson 18 / 1,021 blue and green eco earth sign isolated Vector Clip Art by kednert 1 / 97 Green concept ecology background with grass and earth Vector by smeagorl 2 / 43 Green Earth Vector by vectomart 1 / 96 Green earth Clipart Vector by 9comeback 1 / 76 Green Earth EPS Vectors by Deskcube 2 / 128 Green earth Vectors by 9comeback 2 / 46 Green Earth Vectors Illustration by bluering 2 / 71 Green Earth Vector Illustration by adamson 1 / 59 eco, green earth Vector Clip Art by yupiramos 2 / 125 Green Earth planet Vector by PixelEmbargo 4 / 221 Green earth background Clip Art Vector by roxanabalint 3 / 218 Green earth Vectors by 9comeback 2 / 26 Eco Green Earth Clip Art Vector by Merlinul 3 / 170 green earth tree Vector by huhulin 4 / 251 green earth Clipart Vector by get4net 2 / 172 natural earth globe Clipart Vector by Nicemonkey 122 / 5,930 Green Earth Vectors by vectomart 2 / 31 Green Earth Vectors by barbaliss 1 / 15 Green earth pregnancy Vector Illustration by orkidia 2 / 42 Green Earth Vectors Illustration by vectomart 1 / 4 Green earth plug EPS Vector by huhulin 1 / 139 Green Earth Vector Illustration by ABDESIGN 1 / 8 Green Earth background Vectors Illustration by alila 3 / 282 Green Earth With Leaves Vector Illustration by almir1968 1 / 153 Green Earth Vectors by vectomart 1 / 44 green earth- ecology concept Clipart Vector by Artmy 2 / 8 Green Earth Vector Clip Art by scusi 0 / 91 Green Earth Clipart Vector by PixelEmbargo 1 / 115 Green Earth - America. 
Green Earth Vector by PixelEmbargo 6 / 421 green earth Vector by cteconsulting 3 / 73 Green earth Clip Art Vector by 9comeback 6 / 76 Green earth EPS Vectors by soleilc 19 / 1,205 Green Earth Vectors by rayuken 16 / 1,179 earth and environment icon, green ba Vectors Illustration by hoperan 110 / 10,347 Green environmental earth Vector Illustration by soleilc 31 / 1,894 Green earth Clip Art Vector by 9comeback 1 / 21 Green world tree vector illustration Clip Art Vector by Krisdog 146 / 22,799 Green earth background EPS Vectors by Merlinul 2 / 52 Green Earth.
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