PREVIEW: #OUMUMUA: From a conversation with NASA David Grinspoon, Senior Scientist for Astrobiology, re the theory of Panspermia and the interstellar object Oumuamua and its ilk. More later on Oumuamua, what we know and don't know, and what plans to stud

PREVIEW: #OUMUMUA:  From a conversation with NASA David Grinspoon, Senior Scientist for Astrobiology, re the theory of Panspermia and the interstellar object Oumuamua and its ilk. More later on Oumuamua, what we know and don't know, and what plans to study the next such? 

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