Double Helix: How an Image Sparked the Discovery of the Secret of Life

by Danielle Smith-Llera

Overview

To the untrained eye, Photo 51 was simply a grainy black and white image of dark marks scattered in a rough cross shape. But to the eye of a trained scientist, it was a clear portrait of a DNA fiber taken with X-rays. And to young scientists James Watson and Francis Crick, it confirmed their guess of deoxyribonucleic acid's structure. In 1953 the pair was racing toward solving the mystery of DNA's structure before other scientists could beat them to it. They and others believed that finding the simple structure of the DNA molecule would answer a great mystery, how do organisms live, grow, develop, and survive, generation after generation? Photo 51 and subsequent models based on the photo would prove to be the key to unlocking the secret of life.

Product Details

ISBN-13:	9780756556464
Publisher:	Capstone
Publication date:	01/08/2017
Series:	Captured Science History Series
Pages:	64
Product dimensions:	8.90(w) x 10.10(h) x 0.20(d)
Lexile:	1060L (what's this?)
Age Range:	10 - 12 Years

About the Author

Danielle Smith-Llera grew up in coastal Virginia, hearing unforgettable tales about her Mexican and Irish ancestors. She first moved overseas to teach in international schools in Hungary and Brazil. Life in the U.S. Foreign Service has taken her around the world to live in India, Jamaica, Romania, Belgium, the United Kingdom, and Washington, DC. She loves sharing stories—fiction, nonfiction, and a mixture of both—in classrooms, museum exhibits, and, of course, books.

Table of Contents

Glimpse of a photo — Long chain of discoveries — Racing to the prize — New questions ; Timeline — Glossary — Additional resources — Source notes — Select bibliography — Index.

Interviews

• Over 275,000 copies sold in the Captured History series