Answer:
There are many such contributions, but one of the greatest ones was by Nikola Tesla, a serbian immigrant who brought the AC (Alternating Current) uprising to America, despite the efforts of many reputed scientists.
Explanation:
Nikola Tesla provided many examples as to how Alternating Current was superior to DC (Direct Current), as in reduced physical contact, greater efficiency, and a wider range of applications.
Explanation:
The election was very close. Even though Al Gore won the popular vote, the election was ultimately decided by the electoral votes of Florida.
It prompted competitive countries to send unmanned space probes to the Moon, Venus and Mars.