Kenneth R. Miller — American Scientist born on July 14, 1948,

Kenneth Raymond Miller is an American cell biologist and molecular biologist who is currently Professor of Biology and Royce Family Professor for Teaching Excellence at Brown University. Miller's primary research focus is the structure and function of cell membranes, especially chloroplast thylakoid membranes. Miller is noted as a co-author of a major introductory college and high school biology textbook published by Prentice Hall since 1990. Miller, who is Roman Catholic, is particularly known for his opposition to creationism, including the intelligent design movement. He has written two books on the subject: Finding Darwin's God, which argues that acceptance of evolution is compatible with a belief in God; and Only a Theory, which explores ID and the Kitzmiller v. Dover Area School District case as well as its implications in science across America... (wikipedia)

Once upon a time, growing up male gave little boys a sense of certainty about the natural order of things. We had short hair, wore pants, and played baseball. Girls had long hair, wore skirts, and, no matter how hard they tried, always threw a baseball just like a girl.
Although each egg cell produced by a woman carries a single X chromosome, the sperm cells produced by a man carry either an X or a Y. This means, in very simple terms, that the sperm cell determines a baby's sex.
Biology is far from understanding exactly how a single cell develops into a baby, but research suggests that human development can ultimately be explained in terms of biochemistry and molecular biology. Most scientists would make a similar statement about evolution.
Our own genomes carry the story of evolution, written in DNA, the language of molecular genetics, and the narrative is unmistakable.
We don't regard any scientific theory as the absolute truth.