The problem of the unknowable future is matched by the problem of the 
unchangeable past.  Both are solved by the dream of time travel. 

The peculiarities and paradoxes of time travel are explored in imaginative 
detail in science fiction, even though time travel doesn’t exist, or maybe 
especially because it doesn’t exist.  Grappling with the idea helps humans 
engage with a dimension of profound human powerlessness and also invites deeper 
thinking about what actually can be known about the past and what actually can 
be done about the future.

James Gleick’s meditation on time covers how time is experienced 
psychologically, how artists such as Borges, Proust, and Wells create with it, 
how religions conjure eternity, how cosmology probes forking universes, and how 
so much comes down to the nature of “now.”

Science historian Gleick is the author of Chaos (1987), Isaac Newton (2003), 
The Information (2011), and Time Travel: A History (2016).

[Note: The talk is already sold out.  Most walkups get in.  Also consider 
watching the life-stream, which is edited in real time like the eventual 

"Time Travel," James Gleick, SFJAZZ Center, Hayes Valley, San Francisco, 7pm, 
Monday June 5.  The show starts promptly at 7:30pm.

• Seminar at SFJAZZ Center <> 201 
Franklin Street, San Francisco, CA 94102
• Tune into the live audio stream <> for Long Now 
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Share this talk: James Gleick, "Time Travel" Long Now talk on 6/5 <>

Talks coming up:
July 24 (Mon.) - Carolyn Porco, Looking for Life in the Solar System 
August  7 (Mon.) - Nicky Case, Seeing Whole Systems
Sept 6 (Wed.) - David Grinspoon, Earth in Human Hands
Nov 20 (Mon.) - Elena Bennett, Seeds of a Good Anthropocene 

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