ANCIENT CIVIL
ENGINEERING STRUCTUREs
,PREHIsTORIC TIMEs
Before Man knew how to build shelters, they made use of the natural
environment to
provide them with shelter.
The earliest forms of shelter Another natural form of shelter was
were those in trees, where it the cave, which provided greater
would provide minimal protection against inclement
protection against the searing weather, though offering less
heat of the sun and the cold protection against wild animals.
of the rain.
,