Babbage: Polio returns

Published: June 13, 2018, 11:51 a.m.

Why has polio made a comeback in Venezuela and how does it spread? Tien Tzuo, founder of Zuora, says there will be no need to own anything in the future — you will subscribe to everything.  And research into how marine mammals respond to predators shows there is safety in numbers. Tom Standage hosts.  


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