http://www.microbe.org/careers/careers.asp History of Inventions: A Timeline Swimming pools were invented almost 4500 years ago in 2500 B.C. Find out who invented such objects ranging from light bulbs and computers to hot dogs and electric guitars.
(A Timeline Swimming pools; were invented; T:almost 4500 years ago; T:in 2500) (such objects; ranging; from light bulbs and computers to hot dogs and electric guitars) (B.C.; Find out; who invented such objects)
A Timeline Swimming pools such objects B.C.
were invented ranging Find out
T:almost 4500 years ago T:in 2500
from light bulbs and computers to hot dogs and electric guitars
who invented such objects