History. 1  A soldier carries an early example (1945) of mobile synchronous radio communication. 2  A basic chat box allows quick communication, but with too many people can be frustrating. 3  All those red flags are messages I've ignored, a pitfall of asynchronous communication.
Earth's Largest Volcano-Mauna Loa,Hawaii. The largest volcano in the world is Mauna Loa on the island of Hawaii. There have been references to Yellowstone as the largest volcanic system in North America, but most, if not all, scientific organizations recognize Mauna Loa as the largest single volcano.
The Most Dangerous Volcanoes in the U.S. The most dangerous volcanoes in the U.S. are all composite volcanoes along the American Ring of Fire on the U.S. West Coast and Alaska, except for the two shield volcanoes on the Big Island of Hawaii. Mauna Loa and Kilauea are ranked #8 and #1 respectively.