TitleDate
Air ConditioningApr 22, 2017 Listen
ElevatorApr 15, 2017 Listen
Contraceptive PillApr 08, 2017 Listen
TV DinnerApr 01, 2017 Listen
GramophoneMar 25, 2017 Listen
BatteryMar 18, 2017 Listen
Public key cryptographyMar 11, 2017 Listen
RobotMar 04, 2017 Listen
Disposable RazorFeb 25, 2017 Listen
ClockFeb 18, 2017 Listen
GoogleFeb 11, 2017 Listen
InsuranceFeb 04, 2017 Listen
PaperJan 28, 2017 Listen
AntibioticsJan 21, 2017 Listen
Billy BookcaseJan 14, 2017 Listen
CompilerJan 07, 2017 Listen
M-PesaDec 31, 2016 Listen
LightbulbDec 24, 2016 Listen
BankingDec 17, 2016 Listen
BarcodeDec 10, 2016 Listen
iPhoneDec 03, 2016 Listen
ConcreteNov 26, 2016 Listen
Shipping ContainerNov 19, 2016 Listen
Haber-Bosch ProcessNov 12, 2016 Listen
Diesel EngineNov 05, 2016 Listen