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In the 1880s, science witnessed a major shift: Charles Darwin proposed his theory of evolution. People dug up the first dinosaur fossils. And the field of paleontology—the study of ancient plants and animals—emerged. Othniel Charles Marsh and Edward Drinker Cope became enthralled with these new ideas, discoveries, and developments. Both were determined to become world-famous paleontologists. When they met in 1863, they started off as friends....
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In the mid-1980s, some geneticists proposed a daring project to sequence the human genome. That meant figuring out the exact order of the three billion chemical pairs that make up human DNA. Sequencing the human genome could help scientists understand how our bodies work and help doctors diagnose, treat, and prevent certain diseases. The Human Genome Project launched in 1990, with scientists around the world collaborating on the research. They worked...
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In the early 1980s, doctors sounded the alarm. A mysterious new disease—acquired immunodeficiency syndrome, or AIDS—was spreading around the world. While many of the first AIDS patients were gay men, no one seemed to be immune from the deadly blood-borne disease. Researchers set to work to discover what was causing AIDS. They suspected a virus. Two teams of scientists—one in the United States and one in France—worked tirelessly to identify...
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In the early 1880s, only a few wealthy people had electric lighting in their homes. Everyone else had use more dangerous lighting, such as gas lamps. Eager companies wanted to be the first to supply electricity to more Americans. The early providers would set the standards—and reap great profits. Inventor Thomas Edison already had a leading role in the industry: he had invented the first reliable electrical lightbulb. By 1882 his Edison Electric...
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