GROW

What tells living cells how to grow?

The creators of Many: The Diversity of Life on Earth (2017) now introduce young readers to DNA—the instructions packed in every living cell. Opening with the simple idea that all living things grow, they use specific examples and cheerful illustrations to show how growth is about time, size, and change. Two children of color serve as examples of human growth from “a tiny blob smaller than a dot” (wee print emphasizes the “tiny”) to a reproducing adult; they and other children also appear throughout. Readers learn that: Chimpanzees are close relatives; the genetic code for other animals is less similar; and less similar still is the code for plants. But “we share some parts of our genetic code with all living things—those that are alive now and all those that have ever lived on Earth.” Three spreads filled with small but detailed drawings show variations in human beings, in other plants and animals living today, and in fossils. Another spread shows the double helix and its four building blocks: adenine, thymine, cytosine, and guanine. This is followed by one explaining genes, using the example of the wide variation in human eyes, noses, and hair. While many young readers won’t retain all the details, this can provide a sturdy scaffolding for future learning.

The secrets of DNA, unpacked engagingly and accessibly.