Absolutely nothing.  To have engineering, one would need an engineer, no?  My husband is an engineer, and this article really made him laugh.  He showed it to me, and I think it is hysterical.  Read this excerpt (emphasis mine).

Evolution keeps pregnant women upright

WASHINGTON (AP) -- Scientists think they have figured out why pregnant women don't lose their balance and topple over despite ever-growing weight up front.

Evolution provided slight differences from men in women's lower backs and hip joints, allowing them to adjust their center of gravity, new research shows.

This elegant engineering is seen only in female humans and our immediate ancestors who walked on two feet, but not in chimps and apes, according to a study published in Thursday's journal Nature.

Now, I had to take a swear word out of the next excerpt - but look at this!  Evolution has tinkered with the design, and it is absolutely beautiful.

"When you think about it, women make it look so very **** easy," Whitcome said. "They are experiencing a pretty impressive challenge. Evolution has tinkered ... to the point where they can deal with the challenge.

"It's absolutely beautiful," she said. "A little bit of tinkering can have a profound effect."

I laugh, trying to imagine what women went through during all those millinia before the so called "tinkering" took place.  Women falling down all over the place ... trying to get home, but they just keep falling over.  And what of the supposed "tinkering" between being an amoeba and an upright walking human?  Is it not absolutely that the engineering included man and woman, and the ability to reproduce at all?  How about the engineering of the human eye?  Or the hand, with all its nerves and muscles, for grasping?

The article has two things right.  Engineering did take place, and it is absolutely beautiful.  Oh, that they would open their hearts and know this magnificant Engineer!

Emphasis mine:

John 1:  1 - 5  In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.

John 1: 9-14  That was the true Light, which lighteth every man that cometh into the world. He was in the world, and the world was made by him, and the world knew him not. He came unto his own, and his own received him not. But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.