There is no direct proof and dates are estimates.
Stonehenge is thought to have been built by the beaker people.
People
Stonehenge is not a natural formation, it was built by people.
Stonehenge was built by people so the answer to your question is no.
Stonehenge was first seen by the ancient people who built it.
Not century but millennium. Stonehenge was built around 5000 years ago, but nobody knows for absolute certainty.
No it was not built by Egyptians
The major stones of Stonehenge are mostly sandstone, others are igneous rocks.
Yes, it is imperfect like all man-made things! One lintel has an extra hole in it; one stone had a cracked bottom but was packed and used anyway (this flaw led to an early collapse.)
Not At All! It Was Built In 5000 BCE.
A relatively advanced civilization called the Beaker People are believed to have built Stonehenge
yes