Caleb Scharf🌎

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BIO

Thinker, writer, sometimes both at the same time. Senior Scientist for Astrobiology @NASAAmes. Personal account, anything expressed here is my fault alone.

@caleb_scharf

Top followers

#478

Bryan Johnson

@bryan_johnson

Conquering death will be humanity’s greatest achievement.

#828

Kara Swisher

@karaswisher

“Vitriolic” and now “shrill”media lady, though dogs can hear me loud and clear