Measles used to sound like such an old-fashioned disease. But the current Disneyland measles outbreak has put it back in the news, with 141 cases reported so far this year in 17 states and the District of Columbia. While the outbreak has some parents who formerly delayed or refused to vaccinate racing to the clinic, others are becoming more entrenched in their belief that vaccination is both...
Science News of Yesteryear
Anthropology & Archaeology
Botany & Zoology
Cell & Molecular Biology
More than 1,800 years ago, the Greek physician Galen came up with a model for how the human body works. Blood, which he called the "natural spirit," originated in the liver and traveled to all parts of the body through the veins. In the left side of the heart, some of the blood mixed with air from the lungs to make "vital spirit," which flowed to all parts of the body through the arteries....