Examines the history of the radio, notings its inventors and early uses, and explores modern, untraditional uses of radio waves.
精彩科學技術史-艱難的啟蒙
精彩科學技術史-科學精神的覺醒
High-tech DIY proj ...
精彩科學技術史-在黑暗中探索
精彩科學技術史-工業化浪潮
The airplane
The submarine
The television
Solar power
The clock
The printing press
Nuclear energy
Inventions we use ...