Explore the hypothetical scenario of alien spacecraft entering Earth's atmosphere and a possible invasion. Scientists and other experts unravel and contemplate the potential impact of such an extraordinary event.

The below guests are featured in this episode: 

• Seth Shostak
• Neil Tyson
• Nick Sagan
• Jill Tarter
• David Brin
• John Scalzi
• Douglas Vakoch

For even more Alien Encounters, head to discovery+. Go to discoveryplus.com/alienencounters. Terms apply. 

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