9781422282939

7

Science and Energy

INTRODUCTION Crime Stoppers

Words to Understand ballistics  the study of firearms and projectiles, including bullets genetic  relating to a person’s heredity high-resolution  providing detailed images that have a high number of pixels per inch toxicology  scientific study of poisons

A December morning started out hot and hazy in Sydney, Australia.With 10 days until Christmas, many people were in a manic frame of mind. They scurried across the city buying Christmas presents, planning parties, and decorating for the holidays. As dawn turned into late morning, a few people decided to begin their day quietly before setting about their daily grind. John O’Brien, 83, visited the Lindt Café in the middle of the city’s business district after his annual eye doctor’s appointment. LouisaHope, 50, and her mother,Robyn, 70, had stayed overnight in Sydney and went to the café as a side trip. Workers behind the café’s counter busily filled orders.