Learning

In a bid to detect cancers early and in a noninvasive way, scientists at the Johns Hopkins Kimmel Cancer Center report they have developed a test that spots tiny amounts of cancer-specific DNA in blood and have used it to accurately identify more than half of 138 people with relatively early-stage colorectal, breast, lung and ovarian cancers. The test, the scientists say, is novel in that it can distinguish between DNA shed from tumors and other altered DNA that can be mistaken for cancer biomarkers. more »

Internet Scout's Research Group's weekly marvelous discoveries: In February 1623, a group of Dutch officials accused a team of English merchants and Japanese mercenaries of conspiring to capture a castle on Amboyna, a small island in what is now part of Indonesia. The island was central to the booming spice trade, which had fueled an increasingly acrimonious rivalry between the British and the Dutch. "Folk art is a reflection of society as seen through the eyes of artists whose perceptions are sometimes traditional and conventional - sometimes unruly, and even wild." So writes the Canadian Museum of History, host of a online exhibit that highlights Quebec folk art from the eighteenth century through today. Michael Twitty explains how enslaved African-Americans created contemporary American southern cuisine. more »

UC Berkeley solar physicist Oliveros cautions that smart phones, cameras, binoculars or telescopes must also be protected by an eclipse filter, created either by cutting up eclipse glasses and taping the filter over the camera lens, or by buying a special sun-safe filter or a number 14 welder’s glass to mount over the objective lens.  more »

In the report "Generations of War: The Rise of the Warrior Caste and the All-Volunteer Force," the Center for a New American Security" Research Associate Amy Schafer writes that the trend of military service being passed from generation to generation has created a warrior caste in which a small section of the population bears the burden of America's wars. The report examines the risks and benefits associated with a warrior caste, but advocates against returning to conscription. more »