11/12 -- Steven uncovers the reason Alexander Graham Bell invented the telephone

[paul-f]

...and it will be revealed tonight on PBS. This should be interesting. ;-)   

(Check your local TV listing.)     

How We Got to Now with Steven Johnson
PBS - Wed, 11/12, 10:00 PM 1 hr
"Sound"   

New, 11/12/2014, Profile, History, Technology, Science  Steven explores the Arcy sur Cure caves in France, uncovers the reason Alexander Graham Bell invented the telephone, and participates in an ultrasound on a pregnant dolphin in order to examine the impact sound has on medicine and the modern world.