▁ 1 8 th ▁century , ▁the ▁Indust rial ▁Revolution ▁was ▁a ▁period ▁of ▁great ▁techn ological ▁discovery , ▁particularly ▁in ▁the ▁areas ▁of ▁agricult ure , ▁manufact uring , ▁min ing , ▁met all ur gy , ▁and ▁transport , ▁driven ▁by ▁the ▁discovery ▁of ▁steam ▁power . ▁Technology ▁took ▁another ▁step ▁in ▁a ▁second ▁industrial ▁revolution ▁with ▁the ▁har ness ing ▁of ▁electric ity ▁to ▁create ▁such ▁innov ations ▁as ▁the ▁electric ▁motor , ▁light ▁bul b , ▁and ▁count less ▁others . ▁Scient ific ▁adv ancement ▁and ▁the ▁discovery ▁of ▁new ▁concepts ▁later ▁allowed ▁for ▁power ed ▁flight ▁and ▁adv anc ements ▁in ▁medicine , ▁chem istry , ▁physics , ▁and ▁engineering . ▁The ▁rise ▁in ▁technology ▁has ▁led ▁to ▁sk ys c rap ers ▁and ▁broad ▁urban ▁areas ▁whose ▁inhabitants ▁rely ▁on ▁mot ors ▁to ▁transport ▁them ▁and ▁their ▁food ▁supply . ▁Communic ation ▁was ▁also ▁greatly ▁improved ▁with ▁the ▁in vention ▁of ▁the ▁te legraph , ▁tele phone , ▁radio ▁and ▁television . ▁The ▁late ▁ 1 9 th ▁and ▁early ▁ 2 0 th ▁centuries ▁saw ▁a ▁revolution ▁in ▁transport ation ▁with ▁the ▁in vention ▁of ▁the ▁air plane ▁and ▁autom obile . ▁ ▁The ▁ 2 0 th ▁century ▁brought ▁a ▁host ▁of ▁innov ations . ▁In ▁physics , ▁the ▁discovery ▁of ▁nuclear ▁f ission ▁has ▁led ▁to ▁both ▁nuclear ▁weapons ▁and ▁nuclear ▁power . ▁Comput ers ▁were ▁also ▁invent ed ▁and ▁later ▁mini atur ized ▁using ▁trans ist ors ▁and ▁integrated ▁circ uits . ▁Information