TED talks: Historical Details

Genevieve von Petzinger:  Why are these 32 symbols found in ancient caves all over Europe? 12min.

http://www.ted.com/talks/genevieve_von_petzinger_why_are_these_32_symbols_found_in_ancient_caves_all_over_europe

Neil MacGregor: 2600 years of history in one object. 20min.

http://www.ted.com/talks/neil_macgregor_2600_years_of_history_in_one_object

John Graham-Cumming: The greatest machine that never was. 13min.

http://www.ted.com/talks/john_graham_cumming_the_greatest_machine_that_never_was

Latif Nasser:  The amazing story of the man who gave us modern pain relief. 14min.

http://www.ted.com/talks/latif_nasser_the_amazing_story_of_the_man_who_gave_us_modern_pain_relief

Nicholas Negroponte: A 30-year history of the future. 20min.

http://www.ted.com/talks/nicholas_negroponte_a_30_year_history_of_the_future#t-110044