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Long before C-3PO and Wall-e, there was Elektro, a smoking, talking, and walking robot that wowed the World's Fair in 1939. Meet the seminal robot that has been rescued from the scrap heap of time.
Don't expect an all-electric plane to carry hundreds of passengers soon, but in some corners of aviation, battery-powered aircraft are attracting industry interest.
Recently emerged photograph of the planet taken aboard a Russian satellite shows the Earth in stunning color and detail.