In 1913 Professor Hans Reck, of Berlin University, conducted investigations at Olduvai Gorge in Tanzania, then German East Africa.
During his stay at Olduvai Gorge, Reck found a modern human skeleton that remains a source of mystery and controversy to this day.
This modern skull is from a fully human skeleton found that year. The human skeletal remains, including this complete skull, were cemented in the rock and had to be chipped with hammers and chisels. It was found in the upper end of a rock bed dated at more than 1,000,000 years old.
How did this modern human find his way 1,000,000 years into the past?
He didn't. Although we can now see that his remains have been used to perpetuate a fabrication, to whit:
Late in the summer of 1860, Professor Giuseppe Ragazzoni, a geologist and teacher at the Technical Institute of Brescia, traveled to the nearby locale of Castenedolo, about 10 kilometers southeast of Brescia, to gather fossil shells in the Pliocene strata exposed in a pit at the base of a low hill, the Colle de Vento.
Here he discovered this remarkable and anatomically modern human skull. The stratum from which it was taken is assigned to the Astian stage of the Pliocene.
According to modern authorities, the Astian belongs to the Middle Pliocene, which would give the skull an age of 3 - 4 million years.
This is another fabrication being perpetuated as true as well:
Cremo and Thompson, in their book Forbidden Archeology, claim that the original documents in fact do not support the claim of intrusive burial (see here). Not being able to obtain the original literature I can neither confirm nor deny this, though I do not have a lot of faith in the scholarship of Cremo and Thompson (see a review of their book here). Whatever the details, I find the modern tests conducted on the bones more convincing than ancient reports at second-hand.
As to the Willendorf Venus, it doesn't require a civilization to create art. Many cultures that never reached the level to be considered a civilization have created works of art.