Another TED talk classic! Just listening to the first five mins of Matt Ridley's When ideas have sex suggests a wealth of opportunities for utilizing it in teaching sessions.
The statistics, lexical chains and easy relation to business open it up to various of my current business English groups and suggest that it'll quickly get used in an EFL session.
facts and figures of growth
hand axe < > computer mouse
both designed to fit the hand
1 million year model
one substance < > range of substances
+ range of ideas
combination, cumulative, accumulation, combinatorial,
inherit, lineages, evolution, handed down,
exchange, reciprocity, trade,