There were noteworthy events in telecommunications, aeronautical engineering, and chemistry. 

 - January 14th: The first reliable wireless transmission of voices was broadcast across the Atlantic Ocean. The call was sent from H. B. Thayer in New York, president of American Telephone and Telegraph (AT&T) who developed the technology, to Guglielmo Marconi who was listening in London. 
  - January 17th: The first practical helicopter, designed by Spanish engineer Juan de la Cierva, takes flight outside of Madrid. It was documented to have flown a distance of 600 feet while maintaining an altitude of 13 feet. 
  - January 19th: Dirk Coster and George de Hevesy discover element 72, hafnium in Copenhagen, Denmark. The discovery came 54 years after Dmitri Mendeleev first predicted its existence in 1869.
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